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Opacity (optics)

Index Opacity (optics)

Opacity is the measure of impenetrability to electromagnetic or other kinds of radiation, especially visible light. [1]

304 relations: Acca sellowiana, Acrylic painting techniques, Amblyopia, American Astronomical Society 215th meeting, Anglo-Saxon glass, Anti-Black Box Curriculum Movement, Antiportal, Arthur M. Lesk, Asteroid hyalosis, Atmosphere, Atmosphere of Earth, Atmosphere of Uranus, Atmospheric diffraction, Attenuation coefficient, AVE Class 103, Baghouse, Barolo, Batiste, BBC Four idents, Bead, Beer style, Beeswax, Berlin's edema, Bidirectional reflectance distribution function, Blackout (fabric), Blister pack, BoPET, Bovine malignant catarrhal fever, Burmese glass, Carbon, Caseros Prison Demolition Project – 16 Tons, Cassiterite, Castle Bravo, Celestial globe, Ceramic, Ceramic art, Chelsea porcelain factory, Chinese influences on Islamic pottery, Chromatophore, Chronology of the universe, Cicadinae, Ciliary body melanoma, Cleaning event, Clipping path, Coconut milk, Colimaite, Color, Color term, Community-acquired pneumonia, Computer Originated World, ..., Concealer, Confocal microscopy, Continuous emissions monitoring system, Convection zone, Corn starch, CoRoT, Corundum, Cosmic microwave background, Curtain wall (architecture), Cylindrite, Daily Express Building, Manchester, Dammar gum, Dante Marioni, Decoupling (cosmology), Degree Angular Scale Interferometer, Devitrification, Diffuse panbronchiolitis, Diffusion damping, Dodging and burning, Donoghue v Stevenson, Drawdown card, Drawdown chart, Drink mixer, Eddington luminosity, Edeowie glass, Electrical resistivity and conductivity, Electroluminescent display, Empressite, English tort law, Epoxy, Epoxy glazing, Eta Carinae, Eucalyptus, External wall insulation, Extraterrestrial skies, Facet, Feroxyhyte, Flo-Master, Floreasca City Center, Florida keratopathy, Francisella, GameKing, Gel pen, Glass-ceramic, Glassine, Glossary of astronomy, Glue-size, Gouache, Graphene, Graphics tablet, Greek letters used in mathematics, science, and engineering, Greenhouse, Gynography, Hail, Hakea leucoptera, Harris Mayer, Hayashi track, Hellenistic glass, Herbig–Haro object, Hexagonite, Hispano-Moresque ware, History of the Teller–Ulam design, Hohlraum, Holography, Horror fusionis, Howlite, HP-150, Hydrogen line, Hydrogrossular, Hypolith, Ice, Ice detector, Index of physics articles (O), Industrial radiography, Inkscape, Instability strip, Iron-rich sedimentary rocks, Islamic art, ITV2, Jade use in Mesoamerica, Jasper, Joseph William Sutton, Kamacite, Kappa mechanism, Kibbie Dome, Kirchhoff's diffraction formula, Klevener de Heiligenstein, Kramers' opacity law, Lascar (volcano), Lautering, Leslie Dan Faculty of Pharmacy, Lincolnshire coast, Lip gloss, List of dog diseases, List of Dutch inventions and discoveries, List of Greek and Latin roots in English/O, List of inventions in the medieval Islamic world, List of largest stars, List of Latin words with English derivatives, Lite-Brite, Loupe, Low emissivity, Lyonsite, Maasai people, Main sequence, Major League Baseball on CBS, Malolactic fermentation, Maria Clara gown, Martians, Go Home, Mathematical descriptions of opacity, Megamaser, Melonite, Metal, Metallic bonding, Metamaterial, Microscopy with UV surface excitation, Microwave, Mohite, Moiré pattern, Moonstar Odyssey, Murano glass, Murdochite, Nagyágite, Nebular hypothesis, Negative-index metamaterial, Nephrite, Novomessor albisetosus, Nuclear fusion, Object Desktop, Observatory, Obsidian use in Mesoamerica, Onchocerciasis, Opacifier, Opacity, Opalescence, Opaline glass, Optical answer sheet, Optical medium, Optical path, Overcast, Paintbrush (software), Paper machine, Paramontroseite, Pen, Photometric stereo, Phototherapeutic keratectomy, Physical property, Pigment, Pinworm (parasite), Pistacia lentiscus, Pixel, Pokémon Art Academy, Polarite, Polyethylene, Polymer clay, Polypropylene, Portable Network Graphics, Postage stamp paper, Powder glass beads, Power Rangers, Printing and writing paper, Proustite, Pulpwood, Pulsar kick, Quellung reaction, R136a1, Radiation zone, Radiodensity, Radiosity (radiometry), Rainwater tank, Rapidly oscillating Ap star, Reciprocity (photography), Red dwarf, Red imported fire ant, Red supergiant star, Refracting telescope, Rendering (computer graphics), Rickets, Rosin, S2 (TV channel), Sakurai's Object, Salt (chemistry), Savagnin Rose, Scattering theory, Selenite (mineral), Sensory loss, Shadow, Shape moiré, Sharp Scale, Smallpox, Smart film, Smart glass, Source function, Standard solar model, Stanford marshmallow experiment, Star, Stellar structure, Stoneware, Strömgren integral, Subdwarf, Subrahmanyan Chandrasekhar, Sun, Svein Rosseland, Temagamite, The Eye of Argon, Theatrical smoke and fog, Three Spheres II, Tiffany jewelry, Tin(IV) Oxide, Tin-glazing, Titan (moon), Titanium dioxide, Tomography, Tooth discoloration, Tracing paper, Transmittance, Transparency and translucency, Tunable metamaterial, Twinwall plastic, Type II supernova, Tyvek, Ultraviolet, Ultraviolet-sensitive bead, Umbra, penumbra and antumbra, Uncertainty principle, Universe, University of Idaho, Uranium glass, UY Scuti, Vanadinite, Variable star, Varnish, Verneuil process, Vinho Verde, Vino pipeño, Vitrification, Volume rendering, Vossius ring, VY Canis Majoris, White dwarf, White lead, White's illusion, Whitewash, Wilhelm Röntgen, Window, WinRoll, X-ray astronomy, X-ray burster, X-ray detector, Xenophilus azovorans, Zinc iodide, Zone plate, 1996 Topps, 1999 South Dakota Learjet crash. Expand index (254 more) »

Acca sellowiana

Acca sellowiana, a species of flowering plant in the myrtle family, Myrtaceae, is native to the highlands of southern Brazil, eastern Paraguay, Uruguay, northern Argentina, and Colombia.

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Acrylic painting techniques

Acrylic painting techniques are different styles of manipulating and working with polymer-based acrylic paints.

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Amblyopia

Amblyopia, also called lazy eye, is a disorder of sight due to the eye and brain not working well together.

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American Astronomical Society 215th meeting

The 215th meeting of the American Astronomical Society (AAS) took place in Washington, D.C., Jan.

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Anglo-Saxon glass

Anglo-Saxon glass has been found across England during archaeological excavations of both settlement and cemetery sites.

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Anti-Black Box Curriculum Movement

The Anti-Black Box Curriculum Movement was a Taiwanese student protest, related to the Sunflower Student Movement, against certain proposed senior high school curriculum changes.

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Antiportal

In computer-generated imagery and real-time 3D computer graphics, antiportal rendering is a way to reduce overdraw (the rendering of detail which will not be in the final image), and in this way to optimize draw speed.

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Arthur M. Lesk

Arthur Mallay Lesk, is a protein science researcher, who is a professor of biochemistry and molecular biology at the Pennsylvania State University in University Park.

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Asteroid hyalosis

Asteroid hyalosis is a degenerative condition of the eye involving small white opacities in the vitreous humor.

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Atmosphere

An atmosphere is a layer or a set of layers of gases surrounding a planet or other material body, that is held in place by the gravity of that body.

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Atmosphere of Earth

The atmosphere of Earth is the layer of gases, commonly known as air, that surrounds the planet Earth and is retained by Earth's gravity.

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Atmosphere of Uranus

The atmosphere of Uranus is composed primarily of hydrogen and helium.

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Atmospheric diffraction

Atmospheric diffraction is manifested in the following principal ways.

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Attenuation coefficient

Attenuation coefficient or narrow beam attenuation coefficient of the volume of a material characterizes how easily it can be penetrated by a beam of light, sound, particles, or other energy or matter.

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AVE Class 103

The AVE Class 103 is a high-speed train used for the AVE service and operated in Spain by the state-run railway company RENFE.

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Baghouse

A baghouse (BH, B/H), bag filter (BF) or fabric filter (FF) is an air pollution control device that removes particulates out of air or gas released from commercial processes or combustion for electricity generation.

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Barolo

Barolo is a red Denominazione di Origine Controllata e Garantita (DOCG) wine produced in the northern Italian region of Piedmont.

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Batiste

Batiste is a fine cloth made from cotton, wool, polyester, or a blend, and the softest of the lightweight opaque fabrics.

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BBC Four idents

BBC Four and its predecessor BBC Knowledge are both channels operated by the BBC as cultural and knowledge based channels.

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Bead

A bead is a small, decorative object that is formed in a variety of shapes and sizes of a material such as stone, bone, shell, glass, plastic, wood or pearl and with a small hole for threading or stringing.

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Beer style

Beer style is a term used to differentiate and categorize beers by factors such as colour, flavour, strength, ingredients, production method, recipe, history, or origin.

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Beeswax

Beeswax (cera alba) is a natural wax produced by honey bees of the genus Apis.

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Berlin's edema

Berlin's edema (commotio retinae) a common condition caused by blunt injury to the eye.

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Bidirectional reflectance distribution function

The bidirectional reflectance distribution function (BRDF; f_(\omega_,\, \omega_)) is a function of four real variables that defines how light is reflected at an opaque surface.

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Blackout (fabric)

Blackout refers to a foam-backed, opaque fabric used to black out light.

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Blister pack

Blister pack is a term for several types of pre-formed plastic packaging used for small consumer goods, foods, and for pharmaceuticals.

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BoPET

BoPET (biaxially-oriented polyethylene terephthalate) is a polyester film made from stretched polyethylene terephthalate (PET) and is used for its high tensile strength, chemical and dimensional stability, transparency, reflectivity, gas and aroma barrier properties, and electrical insulation.

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Bovine malignant catarrhal fever

Bovine malignant catarrhal fever (BMCF) is a fatal lymphoproliferative disease caused by a group of ruminant gamma herpes viruses including Alcelaphine gammaherpesvirus 1 (AlHV-1) and Ovine gammaherpesvirus 2 (OvHV-2) These viruses cause unapparent infection in their reservoir hosts (sheep with OvHV-2 and wildebeest with AlHV-1), but are usually fatal in cattle and other ungulates such as deer, antelope, and buffalo.

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Burmese glass

Burmese glass is a type of opaque colored art glass, shading from yellow to pink.

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Carbon

Carbon (from carbo "coal") is a chemical element with symbol C and atomic number 6.

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Caseros Prison Demolition Project – 16 Tons

The Caseros Prison Demolition Project — 80,000 Tons, which contains 16 Tons and Aparecidos is the work of artist Seth Wulsin.

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Cassiterite

Cassiterite is a tin oxide mineral, SnO2.

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Castle Bravo

Castle Bravo was the first in a series of high-yield thermonuclear weapon design tests conducted by the United States at Bikini Atoll, Marshall Islands, as part of Operation Castle.

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Celestial globe

Celestial globes show the apparent positions of the stars in the sky.

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Ceramic

A ceramic is a non-metallic solid material comprising an inorganic compound of metal, non-metal or metalloid atoms primarily held in ionic and covalent bonds.

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Ceramic art

Ceramic art is art made from ceramic materials, including clay.

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Chelsea porcelain factory

The Chelsea porcelain manufactory (established around 1743-45) is the first important porcelain manufactory in England; its earliest soft-paste porcelain, aimed at the aristocratic market—cream jugs in the form of two seated goats—are dated 1745.

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Chinese influences on Islamic pottery

Chinese influences on Islamic pottery cover a period starting from at least the 8th century CE to the 19th century.

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Chromatophore

Chromatophores are pigment-containing and light-reflecting cells, or groups of cells, found in a wide range of animals including amphibians, fish, reptiles, crustaceans and cephalopods.

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Chronology of the universe

The chronology of the universe describes the history and future of the universe according to Big Bang cosmology.

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Cicadinae

The Cicadinae are a subfamily of cicadas, containing the translucent cicadas.

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Ciliary body melanoma

Ciliary Body Melanoma is a type of cancer arising from the coloured part (uvea) of the eye.

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Cleaning event

A cleaning event is a phenomenon whereby dust is removed from solar panels, specifically only on exploration and science rovers on Mars, supposedly by the action of wind.

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Clipping path

A clipping path (or "deep etch") is a closed vector path, or shape, used to cut out a 2D image in image editing software.

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Coconut milk

Coconut milk is the liquid that comes from the grated meat of a mature coconut.

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Colimaite

Colimaite, the naturally occurring analog of synthetic K3VS4, is a sulfide mineral discovered in southwestern Mexico.

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Color

Color (American English) or colour (Commonwealth English) is the characteristic of human visual perception described through color categories, with names such as red, orange, yellow, green, blue, or purple.

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Color term

A color term (or color name) is a word or phrase that refers to a specific color.

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Community-acquired pneumonia

Community-acquired pneumonia (CAP) refers to pneumonia (any of several lung diseases) contracted by a person with little contact with the healthcare system.

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Computer Originated World

The Computer Originated World (COW) was the method of creating the BBC1 symbol that was used between 18 February 1985 and 16 February 1991.

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Concealer

A concealer or color corrector is a type of cosmetic that is used to mask dark circles, age spots, large pores, and other small blemishes visible on the skin.

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Confocal microscopy

Confocal microscopy, most frequently confocal laser scanning microscopy (CLSM) or laser confocal scanning microscopy (LCSM), is an optical imaging technique for increasing optical resolution and contrast of a micrograph by means of using a spatial pinhole to block out-of-focus light in image formation.

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Continuous emissions monitoring system

Continuous emission monitoring systems (CEMS) were historically used as a tool to monitor flue gas for oxygen, carbon monoxide and carbon dioxide to provide information for combustion control in industrial settings.

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Convection zone

A convection zone, convective zone or convective region of a star is a layer which is unstable to convection.

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Corn starch

Corn starch, cornstarch, cornflour or maize starch or maize is the starch derived from the corn (maize) grain.

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CoRoT

CoRoT (French: Convection, Rotation et Transits planétaires; English: Convection, Rotation and planetary Transits) was a space observatory mission which operated from 2006 to 2013.

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Corundum

Corundum is a crystalline form of aluminium oxide typically containing traces of iron, titanium, vanadium and chromium.

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Cosmic microwave background

The cosmic microwave background (CMB, CMBR) is electromagnetic radiation as a remnant from an early stage of the universe in Big Bang cosmology.

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Curtain wall (architecture)

A curtain wall system is an outer covering of a building in which the outer walls are non-structural, utilized to keep the weather out and the occupants in.

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Cylindrite

Cylindrite is a sulfosalt mineral containing tin, lead, antimony and iron with formula: Pb3Sn4FeSb2S14.

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Daily Express Building, Manchester

The Daily Express Building, located on Great Ancoats Street, Manchester, England, is a Grade II* listed building which was designed by engineer, Sir Owen Williams.

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Dammar gum

Dammar, also called dammar gum, or damar gum, is a resin obtained from the Dipterocarpaceae family of trees in India and East Asia, principally those of the genera Shorea or Hopea (synonym Balanocarpus).

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Dante Marioni

Dante Marioni (born March 3, 1964 in Mill Valley, California, U.S.) is an American glass artist.

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Decoupling (cosmology)

In cosmology, decoupling refers to a period in the development of the universe when different types of particles fall out of thermal equilibrium with each other.

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Degree Angular Scale Interferometer

The Degree Angular Scale Interferometer (DASI) was a telescope installed at the U.S. National Science Foundation's Amundsen–Scott South Pole Station in Antarctica.

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Devitrification

Devitrification is the process of crystallization in a formerly crystal-free (amorphous) glass.

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Diffuse panbronchiolitis

Diffuse panbronchiolitis (DPB) is an inflammatory lung disease of unknown cause.

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Diffusion damping

In modern cosmological theory, diffusion damping, also called photon diffusion damping, is a physical process which reduced density inequalities (anisotropies) in the early universe, making the universe itself and the cosmic microwave background radiation (CMB) more uniform.

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Dodging and burning

Dodging and burning are terms used in photography for a technique used during the printing process to manipulate the exposure of a selected area(s) on a photographic print, deviating from the rest of the image's exposure.

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Donoghue v Stevenson

was a landmark court decision in Scots delict law and English tort law by the House of Lords.

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Drawdown card

Drawdown cards are used for testing paints and coatings through wet film preparation.

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Drawdown chart

Drawdown charts are rectangular pieces of non-fluorescent paper which are used to test a variety of coating properties.

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Drink mixer

Drink mixers are the non-alcoholic ingredients in mixed drinks and cocktails.

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Eddington luminosity

The Eddington luminosity, also referred to as the Eddington limit, is the maximum luminosity a body (such as a star) can achieve when there is balance between the force of radiation acting outward and the gravitational force acting inward.

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Edeowie glass

Edeowie glass is a slag-like, opaque rare natural glass found as vesicular or in sheet-like masses in a semi-continuous swath in baked sediment, about 55 km long and 10 km wide along the western side of the Flinders Ranges near Parachilna, South Australia and Lake Torrens.

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Electrical resistivity and conductivity

Electrical resistivity (also known as resistivity, specific electrical resistance, or volume resistivity) is a fundamental property that quantifies how strongly a given material opposes the flow of electric current.

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Electroluminescent display

Electroluminescent Displays (ELDs) are a type of Flat panel display created by sandwiching a layer of electroluminescent material such as GaAs between two layers of conductors.

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Empressite

Empressite is a mineral form of silver telluride, AgTe.

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English tort law

English tort law is the law governing implicit civil responsibilities that people have to one another, as opposed to those responsibilities laid out in contracts.

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Epoxy

Epoxy is either any of the basic components or the cured end products of epoxy resins, as well as a colloquial name for the epoxide functional group.

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Epoxy glazing

Ceramic fixtures are being more commonly glazed with 2 part epoxy compounds.

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Eta Carinae

Eta Carinae (η Carinae, abbreviated to η Car), formerly known as Eta Argus, is a stellar system containing at least two stars with a combined luminosity greater than five million times that of the Sun, located around 7,500 light-years (2,300 parsecs) distant in the constellation Carina.

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Eucalyptus

Eucalyptus L'Héritier 1789 (plural eucalypti, eucalyptuses or eucalypts) is a diverse genus of flowering trees and shrubs (including a distinct group with a multiple-stem mallee growth habit) in the myrtle family, Myrtaceae.

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External wall insulation

An external wall insulation system (or EWIS) is a thermally insulated, protective, decorative exterior cladding procedure involving the use of expanded polystyrene, mineral wool, polyurethane foam or phenolic foam, topped off with a reinforced cement based, mineral or synthetic finish and plaster.

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Extraterrestrial skies

In astronomy, an extraterrestrial sky is a view of outer space from the surface of a world other than Earth.

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Facet

Facets are flat faces on geometric shapes.

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Feroxyhyte

Feroxyhyte is an oxide/hydroxide of iron, δ-Fe3+O(OH).

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Flo-Master

Flo-Master was a brand of inks and markers in the latter half of the 20th century, remembered particularly for the colorful opacity of the inks.

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Floreasca City Center

Floreasca City Center is a multi-functional center with a shopping and entertainment complex as well as two office buildings in Bucharest.

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Florida keratopathy

Florida keratopathy, also known as Florida spots, is an eye condition characterized by the presence of multiple spots within both corneas.

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Francisella

Francisella is a genus of pathogenic, Gram-negative bacteria.

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GameKing

GameKing is a brand of handheld game consoles, designed and developed by Timetop in 2003, for the Hong Kong consumer market.

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Gel pen

A gel pen uses ink in which pigment is suspended in a water-based gel.

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Glass-ceramic

Glass-ceramics have an amorphous phase and one or more crystalline phases and are produced by a so-called "controlled crystallization" in contrast to a spontaneous crystallization, which is usually not wanted in glass manufacturing.

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Glassine

Glassine is a smooth and glossy paper that is air, water and grease resistant.

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Glossary of astronomy

This page is a glossary of astronomy.

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Glue-size

Glue-size is a painting technique in which pigment is bound (sized) to cloth (usually linen) with hide glue, and typically the unvarnished cloth was then fixed to the frame using the same glue.

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Gouache

Gouache, body color, opaque watercolor, or gouache, is one type of watermedia, paint consisting of Natural pigment, water, a binding agent (usually gum arabic or dextrin), and sometimes additional inert material.

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Graphene

Graphene is a semi-metal with a small overlap between the valence and the conduction bands (zero bandgap material).

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Graphics tablet

A graphic tablet (also known as a digitizer, drawing tablet, digital drawing tablet, pen tablet, or digital art board) is a computer input device that enables a user to hand-draw images, animations and graphics, with a special pen-like stylus, similar to the way a person draws images with a pencil and paper.

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Greek letters used in mathematics, science, and engineering

Greek letters are used in mathematics, science, engineering, and other areas where mathematical notation is used as symbols for constants, special functions, and also conventionally for variables representing certain quantities.

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Greenhouse

A greenhouse (also called a glasshouse) is a structure with walls and roof made mainly of transparent material, such as glass, in which plants requiring regulated climatic conditions are grown.

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Gynography

Gynography (Spanish: ginógrafo, wordmagicsoft.com) is defined as "radiography of the female genital organs" that uses "air or other gas" that is injected intraperitoneally as a contrast medium.

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Hail

Hail is a form of solid precipitation.

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Hakea leucoptera

Hakea leucoptera is a plant of the dry regions of Australia.

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Harris Mayer

Harris L. Mayer (born 1921) is an American physicist known for his collaboration with Edward Teller and John von Neumann.

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Hayashi track

The Hayashi track is a luminosity–temperature relationship obeyed by infant stars of less than in the pre-main-sequence phase (PMS phase) of stellar evolution.

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Hellenistic glass

Hellenistic glass was glass produced during the Hellenistic period, from the conquests of Alexander the Great (356-323 BC) to the expansion of the Roman Empire (second half of the 1st century BC - 476) in the Mediterranean, Europe, western Asia and northern Africa.

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Herbig–Haro object

Herbig–Haro (HH) objects are turbulent looking patches of nebulosity associated with newborn stars.

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Hexagonite

No description.

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Hispano-Moresque ware

Hispano-Moresque ware is a style of initially Islamic pottery created in Al Andalus or Muslim Spain, which continued to be produced under Christian rule in styles blending Islamic and European elements.

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History of the Teller–Ulam design

This article chronicles the history and origins of the Teller–Ulam design, the technical concept behind modern thermonuclear weapons, also known as hydrogen bombs.

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Hohlraum

In radiation thermodynamics, a hohlraum (a non-specific German word for a "hollow space" or "cavity") is a cavity whose walls are in radiative equilibrium with the radiant energy within the cavity.

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Holography

Holography is the science and practice of making holograms.

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Horror fusionis

In ophthalmology, horror fusionis is a condition in which the eyes have an unsteady deviation, with the extraocular muscles performing spasm-like movements that continuously shift the eyes away from the position in which they would be directed to the same point in space, giving rise to diplopia.

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Howlite

Howlite, a calcium borosilicate hydroxide (Ca2B5SiO9(OH)5), is a borate mineral found in evaporite deposits.

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HP-150

The HP-150 (aka HP Touchscreen or HP 45611A) was a compact, powerful and innovative computer made by Hewlett-Packard in 1983.

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Hydrogen line

The hydrogen line, 21-centimeter line or H I line refers to the electromagnetic radiation spectral line that is created by a change in the energy state of neutral hydrogen atoms.

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Hydrogrossular

Hydrogrossular is a calcium aluminium garnet series (formula: Ca3Al2(SiO4)3−x(OH)4x, with hydroxide (OH) partially replacing silica (SiO4)).

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Hypolith

In Arctic and Antarctic ecology, a hypolith is a photosynthetic organism, and an extremophile, that lives underneath rocks in climatically extreme deserts such as Cornwallis Island and Devon Island in the Canadian high Arctic.

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Ice

Ice is water frozen into a solid state.

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Ice detector

An ice detector is an optical transducer probe available for aviation purposes.

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Index of physics articles (O)

The index of physics articles is split into multiple pages due to its size.

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Industrial radiography

Industrial radiography is a method of non-destructive testing where many types of manufactured components can be examined to verify the internal structure and integrity of the specimen.

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Inkscape

Inkscape is a free and open-source vector graphics editor; it can be used to create or edit vector graphics such as illustrations, diagrams, line arts, charts, logos and complex paintings.

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Instability strip

The unqualified term instability strip usually refers to a region of the Hertzsprung–Russell diagram largely occupied by several related classes of pulsating variable stars: Delta Scuti variables, SX Phoenicis variables, and rapidly oscillating Ap stars (roAps) near the main sequence; RR Lyrae variables where it intersects the horizontal branch; and the Cepheid variables where it crosses the supergiants.

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Iron-rich sedimentary rocks

Iron-rich sedimentary rocks are sedimentary rocks which contain 15% or more iron.

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Islamic art

Islamic art encompasses the visual arts produced from the 7th century onward by people who lived within the territory that was inhabited by or ruled by culturally Islamic populations.

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ITV2

ITV2 is a 24-hour, free-to-air entertainment television channel in the United Kingdom, Isle of Man and the Channel Islands owned by ITV Digital Channels Ltd, a division of ITV plc.

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Jade use in Mesoamerica

The use of jade in Mesoamerica for symbolic and ideological ritual was highly influenced by its rarity and value among pre-Columbian Mesoamerican cultures, such as the Olmec, the Maya, and the various groups in the Valley of Mexico.

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Jasper

Jasper, an aggregate of microgranular quartz and/or chalcedony and other mineral phases,Kostov, R. I. 2010.

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Joseph William Sutton

Joseph William Sutton (21 October 1844 – 21 February 1914), identified in the print media as J. W. Sutton, was an Australian engineer, shipbuilder, inventor, pioneer in electric lighting and x-ray pioneer in Queensland.

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Kamacite

Kamacite is an alloy of iron and nickel, which is found on Earth only in meteorites.

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Kappa mechanism

The κ–mechanism is the driving mechanism behind the changes in luminosity of many types of pulsating variable stars.

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Kibbie Dome

The William H. Kibbie-ASUI Activity Center (commonly known as the Kibbie Dome) is a multi-purpose indoor athletic stadium in the northwest United States, on the campus of the University of Idaho in Moscow, Idaho.

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Kirchhoff's diffraction formula

Kirchhoff's diffraction formula (also Fresnel–Kirchhoff diffraction formula) can be used to model the propagation of light in a wide range of configurations, either analytically or using numerical modelling.

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Klevener de Heiligenstein

Klevener de Heiligenstein, also known in English by its German name, Heiligensteiner Klevener, is a designation used on Alsace wine made from pink-skinned Savagnin rose grapes, a variety in the Traminer family, but which is less aromatic than Gewürztraminer, which is widely planted in Alsace.

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Kramers' opacity law

Kramers' opacity law describes the opacity of a medium in terms of the ambient density and temperature, assuming that the opacity is dominated by bound-free absorption (the absorption of light during ionization of a bound electron) or free-free absorption (the absorption of light when scattering a free ion, also called bremsstrahlung).

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Lascar (volcano)

Lascar is a stratovolcano within the Central Volcanic Zone of the Andes, a volcanic arc that spans the countries of Peru, Bolivia, Argentina and Chile.

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Lautering

Lautering is a process in brewing beer in which the mash is separated into the clear liquid wort and the residual grain.

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Leslie Dan Faculty of Pharmacy

The Leslie Dan Faculty of Pharmacy is a pharmacy school and an academic division of the University of Toronto.

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Lincolnshire coast

The coast of Lincolnshire runs for more than down the North Sea coast of eastern England, from the estuary of the Humber (which divides it from East Yorkshire) to the marshlands of the Wash, where it meets Norfolk.

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Lip gloss

Lip gloss is a product used primarily to give lips a glossy lustre, and sometimes to add a subtle color.

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List of dog diseases

This list of dog diseases is a selection of diseases and other conditions found in the dog.

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List of Dutch inventions and discoveries

The Netherlands had a considerable part in the making of modern society.

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List of Greek and Latin roots in English/O

Category:Lists of words.

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List of inventions in the medieval Islamic world

The following is a list of inventions made in the medieval Islamic world, especially during the "Islamic Golden Age" (8th to 13th centuries), as well as the late medieval period, especially in the Emirate of Granada and the Ottoman Empire.

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List of largest stars

Below is an ordered list of the largest stars currently known by radius.

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List of Latin words with English derivatives

This is a list of Latin words with derivatives in English (and other modern languages).

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Lite-Brite

Lite-Brite is a toy that was originally marketed in 1967.

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Loupe

A loupe is a simple, small magnification device used to see small details more closely.

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Low emissivity

Low emissivity (low e or low thermal emissivity) refers to a surface condition that emits low levels of radiant thermal (heat) energy.

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Lyonsite

Lyonsite (Cu3Fe+34(VO4)6) is a rare black vanadate mineral that is opaque with a metallic lustre.

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Maasai people

Maasai are a Nilotic ethnic group inhabiting central and southern Kenya and northern Tanzania.

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Main sequence

In astronomy, the main sequence is a continuous and distinctive band of stars that appear on plots of stellar color versus brightness.

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Major League Baseball on CBS

Major League Baseball on CBS is the branding used for broadcasts of Major League Baseball (MLB) games produced by CBS Sports, the sports division of the CBS television network in the United States.

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Malolactic fermentation

Malolactic fermentation (also known as malolactic conversion or MLF) is a process in winemaking in which tart-tasting malic acid, naturally present in grape must, is converted to softer-tasting lactic acid.

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Maria Clara gown

The María Clara gown, sometimes referred to as Traje de Mestiza or simply terno, is a traditional dress worn by women in the Philippines.

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Martians, Go Home

Martians, Go Home is a science fiction comic novel by American writer Fredric Brown, published in the magazine Astounding Science Fiction on September 1954 and later by E. P. Dutton in 1955.

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Mathematical descriptions of opacity

When an electromagnetic wave travels through a medium in which it gets attenuated (this is called an "opaque" or "attenuating" medium), it undergoes exponential decay as described by the Beer–Lambert law.

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Megamaser

A megamaser is a type of astrophysical maser, which is a naturally occurring source of stimulated spectral line emission.

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Melonite

Melonite is a telluride of nickel; it is a metallic mineral.

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Metal

A metal (from Greek μέταλλον métallon, "mine, quarry, metal") is a material (an element, compound, or alloy) that is typically hard when in solid state, opaque, shiny, and has good electrical and thermal conductivity.

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Metallic bonding

Metallic bonding is a type of chemical bonding that arises from the electrostatic attractive force between conduction electrons (in the form of an electron cloud of delocalized electrons) and positively charged metal ions.

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Metamaterial

A metamaterial (from the Greek word μετά meta, meaning "beyond") is a material engineered to have a property that is not found in nature.

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Microscopy with UV surface excitation

Microscopy with UV Surface Excitation (MUSE) is a novel microscopy method that utilize the shallow penetration of UV photons (230 - 300 nm) excitation.

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Microwave

Microwaves are a form of electromagnetic radiation with wavelengths ranging from one meter to one millimeter; with frequencies between and.

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Mohite

Mohite is a copper tin sulfide mineral with the chemical formula Cu2SnS3.

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Moiré pattern

In mathematics, physics, and art, a moiré pattern or moiré fringes are large-scale interference patterns that can be produced when an opaque ruled pattern with transparent gaps is overlaid on another similar pattern.

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Moonstar Odyssey

Moonstar Odyssey (also known as Moonstar) is a 1977 science fiction novel by David Gerrold.

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Murano glass

Murano glass is glass made on the Venetian island of Murano, which has specialized in glassware for centuries.

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Murdochite

Murdochite is a mineral combining lead and copper oxides with formula PbCu6O8−x(Cl,Br)2x(x ≤ 0.5).

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Nagyágite

Nagyágite (Pb5Au(Te,Sb)4S5-8) is a rare sulfide mineral with known occurrence associated with gold ores.

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Nebular hypothesis

The nebular hypothesis is the most widely accepted model in the field of cosmogony to explain the formation and evolution of the Solar System (as well as other planetary systems).

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Negative-index metamaterial

Negative-index metamaterial or negative-index material (NIM) is a metamaterial whose refractive index for an electromagnetic wave has a negative value over some frequency range.

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Nephrite

Nephrite is a variety of the calcium, magnesium, and iron-rich amphibole minerals tremolite or actinolite (aggregates of which also make up one form of asbestos).

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Novomessor albisetosus

Novomessor albisetosus, also known as the desert harvester ant, is a species of ant found in the United States and Mexico.

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Nuclear fusion

In nuclear physics, nuclear fusion is a reaction in which two or more atomic nuclei come close enough to form one or more different atomic nuclei and subatomic particles (neutrons or protons).

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Object Desktop

Object Desktop (OD; previously the Object Desktop Network or ODNT) is an online software subscription service created by Stardock for OS/2 and relaunched for Windows in 1997.

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Observatory

An observatory is a location used for observing terrestrial or celestial events.

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Obsidian use in Mesoamerica

Obsidian is a naturally formed volcanic glass that was an important part of the material culture of Pre-Columbian Mesoamerica.

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Onchocerciasis

Onchocerciasis, also known as river blindness, is a disease caused by infection with the parasitic worm Onchocerca volvulus.

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Opacifier

An opacifier is a substance added to a material in order to make the ensuing system opaque.

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Opacity

Opacity may refer to.

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Opalescence

Opalescence is a type of dichroism seen in highly dispersed systems with little opacity.

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Opaline glass

The term "opaline" in current times refers to many forms of opaque and colored glass.

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Optical answer sheet

An optical answer sheet or bubble sheet is a special type of form used in multiple choice question examinations.

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Optical medium

An optical medium is material through which electromagnetic waves propagate.

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Optical path

The path that light takes in traversing an optical medium or system is often called the optical path.

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Overcast

Overcast or overcast weather, as defined by the World Meteorological Organization, is the meteorological condition of clouds obscuring at least 95% of the sky.

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Paintbrush (software)

Paintbrush is a raster image editor for Mac OS X. It aims to replace MacPaint, an image editor for the classic Mac OS last released in 1988.

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Paper machine

A paper machine (or paper-making machine) is an industrial machine used in the Pulp and paper industry to create paper in large quantities at high speed.

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Paramontroseite

Paramontroseite (V4+O2) is a relatively rare orthorhombic vanadium oxide mineral in the Ramsdellite group.

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Pen

A pen is a common writing instrument used to apply ink to a surface, usually paper, for writing or drawing.

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Photometric stereo

Photometric stereo is a technique in computer vision for estimating the surface normals of objects by observing that object under different lighting conditions.

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Phototherapeutic keratectomy

Phototherapeutic keratectomy (PTK) is a type of eye surgery that uses a laser to treat various ocular disorders by removing tissue from the cornea.

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Physical property

A physical property is any property that is measurable, whose value describes a state of a physical system.

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Pigment

A pigment is a material that changes the color of reflected or transmitted light as the result of wavelength-selective absorption.

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Pinworm (parasite)

The pinworm (species Enterobius vermicularis), also known as threadworm (in the United Kingdom and Australasia) or seatworm, is a parasitic worm.

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Pistacia lentiscus

Pistacia lentiscus (also lentisk; mastic; μαστίχα) is a dioecious evergreen shrub or small tree of the pistacia genus growing up to tall which is cultivated for its aromatic resin, mainly on the Greek island of Chios.

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Pixel

In digital imaging, a pixel, pel, dots, or picture element is a physical point in a raster image, or the smallest addressable element in an all points addressable display device; so it is the smallest controllable element of a picture represented on the screen.

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Pokémon Art Academy

Pokémon Art Academy is an educational drawing video game developed by Headstrong Games, published by Nintendo for the Nintendo 3DS.

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Polarite

Polarite (Pd,(Bi,Pb)), is an opaque, yellow-white mineral.

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Polyethylene

Polyethylene or polythene (abbreviated PE; IUPAC name polyethene or poly(ethylene)) is the most common plastic.

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Polymer clay

Polymer clay is a type of hardenable modeling clay based on the polymer polyvinyl chloride (PVC).

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Polypropylene

Polypropylene (PP), also known as polypropene, is a thermoplastic polymer used in a wide variety of applications.

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Portable Network Graphics

Portable Network Graphics (PNG, pronounced or) is a raster graphics file format that supports lossless data compression.

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Postage stamp paper

Postage stamp paper is the foundation or substrate of the postage stamp to which the ink for the stamp's design is applied to one side and the adhesive is applied to the other.

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Powder glass beads

Powder glass beads are a type of necklace ornamentation.

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Power Rangers

Power Rangers is an American entertainment and merchandising franchise built around a live action superhero television series.

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Printing and writing paper

Printing and writing papers are paper grades used for newspapers, magazines, catalogs, books, commercial printing, business forms, stationeries, copying and digital printing.

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Proustite

Proustite is a sulfosalt mineral consisting of; silver sulfarsenide, Ag3AsS3, known also as light red silver or ruby silver ore, and an important source of the metal.

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Pulpwood

Pulpwood refers to timber with the principal use of making wood pulp for paper production.

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Pulsar kick

A pulsar kick is the phenomenon that a neutron star often does not move with the velocity of its progenitor star, but rather with a substantially greater speed.

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Quellung reaction

The Quellung reaction, also called the Neufeld reaction, is a biochemical reaction in which antibodies bind to the bacterial capsule of Streptococcus pneumoniae, Klebsiella pneumoniae, Neisseria meningitidis, Bacillus anthracis, Haemophilus influenzae, Escherichia coli, and Salmonella.

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R136a1

RMC 136a1 (usually abbreviated to R136a1) is a Wolf–Rayet star located at the center of R136, the central condensation of stars of the large NGC 2070 open cluster in the Tarantula Nebula.

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Radiation zone

A radiation zone, radiative zone or radiative region is a layer of a star's interior where energy is primarily transported toward the exterior by means of radiative diffusion and thermal conduction, rather than by convection.

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Radiodensity

Radiodensity (or radiopacity) is opacity to the radio wave and X-ray portion of the electromagnetic spectrum: that is, the relative inability of those kinds of electromagnetic radiation to pass through a particular material.

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Radiosity (radiometry)

In radiometry, radiosity is the radiant flux leaving (emitted, reflected and transmitted by) a surface per unit area, and spectral radiosity is the radiosity of a surface per unit frequency or wavelength, depending on whether the spectrum is taken as a function of frequency or of wavelength.

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Rainwater tank

A rainwater tank (sometimes called a rain barrel in North America in reference to smaller tanks, or a water butt in the UK) is a water tank used to collect and store rain water runoff, typically from rooftops via pipes.

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Rapidly oscillating Ap star

Rapidly oscillating Ap stars (roAp stars) are a subtype of the Ap star class that exhibit short-timescale rapid photometric or radial velocity variations.

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Reciprocity (photography)

In photography reciprocity is the inverse relationship between the intensity and duration of light that determines the reaction of light-sensitive material.

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Red dwarf

A red dwarf (or M dwarf) is a small and relatively cool star on the main sequence, of M spectral type.

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Red imported fire ant

The red imported fire ant (Solenopsis invicta), also known as the fire ant or RIFA, is a species of ant native to South America.

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Red supergiant star

Red supergiants are stars with a supergiant luminosity class (Yerkes class I) of spectral type K or M. They are the largest stars in the universe in terms of volume, although they are not the most massive or luminous.

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Refracting telescope

A refracting telescope (also called a refractor) is a type of optical telescope that uses a lens as its objective to form an image (also referred to a dioptric telescope).

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Rendering (computer graphics)

Rendering or image synthesis is the automatic process of generating a photorealistic or non-photorealistic image from a 2D or 3D model (or models in what collectively could be called a scene file) by means of computer programs.

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Rickets

Rickets is a condition that results in weak or soft bones in children.

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Rosin

Rosin, also called colophony or Greek pitch (pix græca), is a solid form of resin obtained from pines and some other plants, mostly conifers, produced by heating fresh liquid resin to vaporize the volatile liquid terpene components.

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S2 (TV channel)

S2 was a television station broadcast throughout the Scottish and Grampian ITV regions by SMG plc, the holder of the Scottish and Grampian region ITV franchises.

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Sakurai's Object

Sakurai's Object (V4334 Sgr) is a star in the constellation of Sagittarius.

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Salt (chemistry)

In chemistry, a salt is an ionic compound that can be formed by the neutralization reaction of an acid and a base.

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Savagnin Rose

Savagnin Rose or Roter Traminer is a variety of wine grape.

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Scattering theory

In mathematics and physics, scattering theory is a framework for studying and understanding the scattering of waves and particles.

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Selenite (mineral)

Selenite, satin spar, desert rose, and gypsum flower are four varieties of the mineral gypsum; all four varieties show obvious crystalline structure.

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Sensory loss

Many types of sense loss occur due to a dysfunctional sensation process, whether it be ineffective receptors, nerve damage, or cerebral impairment.

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Shadow

A shadow is a dark area where light from a light source is blocked by an opaque object.

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Shape moiré

Shape moiré is one type of moiré patterns demonstrating the phenomenon of moiré magnification.

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Sharp Scale

The Sharp Scale was devised by Henrietta Sharp Cockrell as an objective and scientific way to measure the opacity of paper, particularly of manuscript folios, 'in the field' without specialized equipment.

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Smallpox

Smallpox was an infectious disease caused by one of two virus variants, Variola major and Variola minor.

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Smart film

Smart film, also called Switchable film, is a product that is capable of adjusting light transmission between transparent and opaque using AC power.

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Smart glass

Smart glass or switchable glass (also smart windows or switchable windows in those applications) is a glass or glazing whose light transmission properties are altered when voltage, light or heat is applied.

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Source function

The source function is a characteristic of a stellar atmosphere, and in the case of no scattering of photons, describes the ratio of the emission coefficient to the absorption coefficient.

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Standard solar model

The standard solar model (SSM) is a mathematical treatment of the Sun as a spherical ball of gas (in varying states of ionisation, with the hydrogen in the deep interior being a completely ionised plasma).

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Stanford marshmallow experiment

The Stanford marshmallow experiment was a series of studies on delayed gratification in the late 1960s and early 1970s led by psychologist Walter Mischel, then a professor at Stanford University.

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Star

A star is type of astronomical object consisting of a luminous spheroid of plasma held together by its own gravity.

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Stellar structure

Stars of different mass and age have varying internal structures.

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Stoneware

--> Stoneware is a rather broad term for pottery or other ceramics fired at a relatively high temperature.

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Strömgren integral

In mathematics and astrophysics, the Strömgren integral, introduced by while computing the Rosseland mean opacity, is the integral: discussed applications of the Strömgren integral in astrophysics, and discussed how to compute it.

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Subdwarf

A subdwarf, sometimes denoted by "sd", is a star with luminosity class VI under the Yerkes spectral classification system.

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Subrahmanyan Chandrasekhar

Subrahmanyan Chandrasekhar FRS (19 October 1910 – 21 August 1995) was an Indian American astrophysicist who spent his professional life in the United States.

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Sun

The Sun is the star at the center of the Solar System.

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Svein Rosseland

Svein Rosseland (March 31, 1894, Kvam, Hardanger – January 19, 1985, Bærum) was a Norwegian astrophysicist and a pioneer in the field of theoretical astrophysics.

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Temagamite

Temagamite is a bright white palladium mercury telluride mineral with a hardness of on the Mohs scale.

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The Eye of Argon

The Eye of Argon is a heroic fantasy novella that narrates the adventures of Grignr, a barbarian.

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Theatrical smoke and fog

Theatrical smoke and fog, also known as special effect smoke, fog or haze, is a category of atmospheric effects used in the entertainment industry.

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Three Spheres II

Three Spheres II is a lithograph print by the Dutch artist M. C. Escher first printed in April 1946.

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Tiffany jewelry

Tiffany jewelry was the jewelry created and supervised by Louis Comfort Tiffany at Tiffany & Co., during the Art Nouveau movement.

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Tin(IV) Oxide

Tin(IV) Oxide, also known as stannic oxide, is the inorganic compound with the formula SnO2.

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Tin-glazing

Tin-glazing is the process of giving ceramic items a tin-based glaze that is white, glossy and opaque, which is normally applied to red or buff earthenware.

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Titan (moon)

Titan is the largest moon of Saturn.

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Titanium dioxide

Titanium dioxide, also known as titanium(IV) oxide or titania, is the naturally occurring oxide of titanium, chemical formula.

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Tomography

Tomography is imaging by sections or sectioning, through the use of any kind of penetrating wave.

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Tooth discoloration

Tooth discoloration (also termed tooth staining) is abnormal tooth color, hue or translucency.

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Tracing paper

Tracing paper is paper made to have low opacity, allowing light to pass through.

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Transmittance

Transmittance of the surface of a material is its effectiveness in transmitting radiant energy.

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Transparency and translucency

In the field of optics, transparency (also called pellucidity or diaphaneity) is the physical property of allowing light to pass through the material without being scattered.

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Tunable metamaterial

A tunable metamaterial is a metamaterial with a variable response to an incident electromagnetic wave.

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Twinwall plastic

Twin-wall plastic, specifically twin-wall polycarbonate, is an extruded multi-wall polymer product created for applications where its strength, thermally insulative properties, and moderate cost are ideal.

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Type II supernova

A Type II supernova (plural: supernovae or supernovas) results from the rapid collapse and violent explosion of a massive star.

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Tyvek

Tyvek is a brand of flashspun high-density polyethylene fibers, a synthetic material; the name is a registered trademark of DuPont.

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Ultraviolet

Ultraviolet (UV) is electromagnetic radiation with a wavelength from 10 nm to 400 nm, shorter than that of visible light but longer than X-rays.

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Ultraviolet-sensitive bead

Ultraviolet-sensitive beads (UV beads) are beads that are colorful in the presence of ultraviolet radiation.

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Umbra, penumbra and antumbra

The umbra, penumbra and antumbra are three distinct parts of a shadow, created by any light source after impinging on an opaque object.

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Uncertainty principle

In quantum mechanics, the uncertainty principle (also known as Heisenberg's uncertainty principle) is any of a variety of mathematical inequalities asserting a fundamental limit to the precision with which certain pairs of physical properties of a particle, known as complementary variables, such as position x and momentum p, can be known.

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Universe

The Universe is all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy.

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University of Idaho

The University of Idaho (officially abbreviated UI, locally referred to as "U of I" or "UIdaho") is the U.S. state of Idaho's oldest public university.

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Uranium glass

Uranium glass is glass which has had uranium, usually in oxide diuranate form, added to a glass mix before melting for coloration.

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UY Scuti

UY Scuti is a red supergiant and pulsating variable star in the constellation Scutum.

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Vanadinite

Vanadinite is a mineral belonging to the apatite group of phosphates, with the chemical formula Pb5(VO4)3Cl.

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Variable star

A variable star is a star whose brightness as seen from Earth (its apparent magnitude) fluctuates.

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Varnish

Varnish is a transparent, hard, protective finish or film that is primarily used in wood finishing but also for other materials.

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Verneuil process

The Verneuil process, also called flame fusion, was the first commercially successful method of manufacturing synthetic gemstones, developed in the late 1800s by the French chemist Auguste Verneuil.

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Vinho Verde

Vinho Verde (literally 'green wine') is a Portuguese wine that originated in the historic Minho province in the far north of the country.

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Vino pipeño

Vino Pipeño is wine from Chile that is made from ordinary grape stock, different from other wines known by their distinctive names.

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Vitrification

Vitrification (from Latin vitreum, "glass" via French vitrifier) is the transformation of a substance into a glass, that is to say a non-crystalline amorphous solid.

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Volume rendering

In scientific visualization and computer graphics, volume rendering is a set of techniques used to display a 2D projection of a 3D discretely sampled data set, typically a 3D scalar field.

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Vossius ring

Vossius ring (also called Vossius's ring or Vossius' ring) is due to blunt trauma to the eye.

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VY Canis Majoris

VY Canis Majoris (VY CMa) is an extreme pulsating red hypergiant (or supergiant) star located in the constellation Canis Major.

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White dwarf

A white dwarf, also called a degenerate dwarf, is a stellar core remnant composed mostly of electron-degenerate matter.

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White lead

White lead is the basic lead carbonate, 2PbCO3·Pb(OH)2.

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White's illusion

White's illusion is a brightness illusion where certain stripes of a black and white grating is partially replaced by a gray rectangle (Fig. 1).

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Whitewash

Whitewash, or calcimine, kalsomine, calsomine, or lime paint is a low-cost type of paint made from slaked lime (calcium hydroxide, Ca(OH)2) and chalk (calcium carbonate, (CaCO3), sometimes known as "whiting". Various other additives are also used.

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Wilhelm Röntgen

Wilhelm Conrad Röntgen (27 March 1845 – 10 February 1923) was a German mechanical engineer and physicist, who, on 8 November 1895, produced and detected electromagnetic radiation in a wavelength range known as X-rays or Röntgen rays, an achievement that earned him the first Nobel Prize in Physics in 1901.

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Window

A window is an opening in a wall, door, roof or vehicle that allows the passage of light, sound, and air.

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WinRoll

WinRoll is an open source, free software utility for Windows 2000, Windows XP and Windows 7 which allows the user to "roll up" windows into their title bars, in addition to other window management related features.

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X-ray astronomy

X-ray astronomy is an observational branch of astronomy which deals with the study of X-ray observation and detection from astronomical objects.

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X-ray burster

X-ray bursters are one class of X-ray binary stars exhibiting periodic and rapid increases in luminosity (typically a factor of 10 or greater) that peak in the X-ray regime of the electromagnetic spectrum.

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X-ray detector

X-ray detectors are devices used to measure the flux, spatial distribution, spectrum, and/or other properties of X-rays.

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Xenophilus azovorans

Xenophilus azovorans is a bacterium from the genus Xenophilus which has been isolated from soil in Switzerland.

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Zinc iodide

Zinc iodide is a chemical compound of zinc and iodine, ZnI2.

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Zone plate

A zone plate is a device used to focus light or other things exhibiting wave character.

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1996 Topps

This is a list with brief descriptions of Topps trading card products for 1996.

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1999 South Dakota Learjet crash

On October 25, 1999, a chartered Learjet 35 was scheduled to fly from Orlando, Florida, to Dallas, Texas.

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Redirects here:

Light proof, Light tight, Rosseland mean, Rosseland mean opacity.

References

[1] https://en.wikipedia.org/wiki/Opacity_(optics)

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