195 relations: Acute radiation syndrome, Allotropes of oxygen, Alternating current, Ancient Greece, Antenna (radio), Astronomy, Astrophysics, Atmosphere of Earth, Atom, Atomic nucleus, Bandplan, Beacon, Black body, Black hole, Cancer, Cavity magnetron, Cell (biology), Centimetre, Chemical bond, Chemical polarity, Chemical reaction, Communications satellite, Compton scattering, Corona, Cosmic microwave background, Cosmic ray, Decimetre, Demodulation, Diathermy, Digital dividend after digital television transition, DNA, DNA repair, Doppler effect, Edward Andrade, Electric current, Electric field, Electroencephalography, Electromagnetic field, Electromagnetic radiation, Electron, Electronvolt, Emission spectrum, Energy, Ernest Rutherford, Exotic atom, Extreme ultraviolet, Extremely high frequency, Extremely low frequency, Far infrared, Faraday effect, ..., Femto-, Fluorescence, Frame of reference, Frequency, Frequency allocation, Gamma ray, Gamma-ray burst, Global Positioning System, Gunn diode, Heinrich Hertz, Hertz, High frequency, Human skin, Hydrogen, Image sensor, IMPATT diode, Infrared, Infrared photography, Infrared window, Innovation, Science and Economic Development Canada, International Telecommunication Union, Ionization, Ionizing radiation, Ionosphere, Irradiation, James Clerk Maxwell, Johann Wilhelm Ritter, Kilo-, Kilometre, Klystron, Lambda, Light, List of international common standards, Low frequency, Luminosity function, Lyman series, Magnetic field, Matter, Maxwell's equations, Medium frequency, Mega-, Metre, Michael Faraday, Micro-, Micrometre, Microwave, Microwave oven, Milli-, Millimetre, Mobile phone, Modulation, Mutagen, Nano-, Nanometre, National Radio Astronomy Observatory, Near and far field, Nebula, Neutron star, Nuclear medicine, Ofcom, Optical fiber, Optical window, Orders of magnitude (length), Oxygen, Ozone layer, Paul Ulrich Villard, Phonon, Photoelectric effect, Photon, Photon energy, Photosynthesis, Pico-, Picometre, Pitch (resin), Planck constant, Planck length, Plasma oscillation, Positron emission tomography, Pyrimidine dimer, Quantum, Radar, Radiant energy, Radiation, Radiation therapy, Radio, Radio broadcasting, Radio receiver, Radio spectrum, Radio wave, Radio window, Radioactive decay, Radiography, Radiolocation, Radionuclide, Radium, Rainbow, Redshift, Reflection (physics), Refraction, Remote control, Resonator, Signal, Skin cancer, Solid-state electronics, Spectroscopy, Spectrum, Speed of light, Submillimetre astronomy, Sun, Sunburn, Super high frequency, Super low frequency, Television, Terahertz radiation, Thorium, Transmission line, Transmission medium, Transmitter, Two-way radio, Ultra high frequency, Ultra low frequency, Ultraviolet, United States Department of Commerce, United States Department of Defense, Universe, University of California, Davis, V band, Very high frequency, Very low frequency, Virtual particle, Visible spectrum, Visual perception, Visual system, Voice frequency, W band, Waveguide, Wavelength, Wi-Fi, Wilhelm Röntgen, William Henry Bragg, William Herschel, Wireless network, Wireless telegraphy, X-ray, X-ray telescope. Expand index (145 more) »
Acute radiation syndrome
Acute radiation syndrome (ARS) is a collection of health effects that are present within 24 hours of exposure to high doses of ionizing radiation.
New!!: Electromagnetic spectrum and Acute radiation syndrome · See more »
Allotropes of oxygen
There are several known allotropes of oxygen.
New!!: Electromagnetic spectrum and Allotropes of oxygen · See more »
Alternating current
Alternating current (AC) is an electric current which periodically reverses direction, in contrast to direct current (DC) which flows only in one direction.
New!!: Electromagnetic spectrum and Alternating current · See more »
Ancient Greece
Ancient Greece was a civilization belonging to a period of Greek history from the Greek Dark Ages of the 13th–9th centuries BC to the end of antiquity (AD 600).
New!!: Electromagnetic spectrum and Ancient Greece · See more »
Antenna (radio)
In radio, an antenna is the interface between radio waves propagating through space and electric currents moving in metal conductors, used with a transmitter or receiver.
New!!: Electromagnetic spectrum and Antenna (radio) · See more »
Astronomy
Astronomy (from ἀστρονομία) is a natural science that studies celestial objects and phenomena.
New!!: Electromagnetic spectrum and Astronomy · See more »
Astrophysics
Astrophysics is the branch of astronomy that employs the principles of physics and chemistry "to ascertain the nature of the astronomical objects, rather than their positions or motions in space".
New!!: Electromagnetic spectrum and Astrophysics · See more »
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.
New!!: Electromagnetic spectrum and Atmosphere of Earth · See more »
Atom
An atom is the smallest constituent unit of ordinary matter that has the properties of a chemical element.
New!!: Electromagnetic spectrum and Atom · See more »
Atomic nucleus
The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom, discovered in 1911 by Ernest Rutherford based on the 1909 Geiger–Marsden gold foil experiment.
New!!: Electromagnetic spectrum and Atomic nucleus · See more »
Bandplan
A bandplan or band plan is a plan for using a particular band of radio frequencies, that are a portion of the electromagnetic spectrum.
New!!: Electromagnetic spectrum and Bandplan · See more »
Beacon
A beacon is an intentionally conspicuous device designed to attract attention to a specific location.
New!!: Electromagnetic spectrum and Beacon · See more »
Black body
A black body is an idealized physical body that absorbs all incident electromagnetic radiation, regardless of frequency or angle of incidence.
New!!: Electromagnetic spectrum and Black body · See more »
Black hole
A black hole is a region of spacetime exhibiting such strong gravitational effects that nothing—not even particles and electromagnetic radiation such as light—can escape from inside it.
New!!: Electromagnetic spectrum and Black hole · See more »
Cancer
Cancer is a group of diseases involving abnormal cell growth with the potential to invade or spread to other parts of the body.
New!!: Electromagnetic spectrum and Cancer · See more »
Cavity magnetron
The cavity magnetron is a high-powered vacuum tube that generates microwaves using the interaction of a stream of electrons with a magnetic field while moving past a series of open metal cavities (cavity resonators).
New!!: Electromagnetic spectrum and Cavity magnetron · See more »
Cell (biology)
The cell (from Latin cella, meaning "small room") is the basic structural, functional, and biological unit of all known living organisms.
New!!: Electromagnetic spectrum and Cell (biology) · See more »
Centimetre
A centimetre (international spelling as used by the International Bureau of Weights and Measures; symbol cm) or centimeter (American spelling) is a unit of length in the metric system, equal to one hundredth of a metre, centi being the SI prefix for a factor of.
New!!: Electromagnetic spectrum and Centimetre · See more »
Chemical bond
A chemical bond is a lasting attraction between atoms, ions or molecules that enables the formation of chemical compounds.
New!!: Electromagnetic spectrum and Chemical bond · See more »
Chemical polarity
In chemistry, polarity is a separation of electric charge leading to a molecule or its chemical groups having an electric dipole or multipole moment.
New!!: Electromagnetic spectrum and Chemical polarity · See more »
Chemical reaction
A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.
New!!: Electromagnetic spectrum and Chemical reaction · See more »
Communications satellite
A communications satellite is an artificial satellite that relays and amplifies radio telecommunications signals via a transponder; it creates a communication channel between a source transmitter and a receiver at different locations on Earth.
New!!: Electromagnetic spectrum and Communications satellite · See more »
Compton scattering
Compton scattering, discovered by Arthur Holly Compton, is the scattering of a photon by a charged particle, usually an electron.
New!!: Electromagnetic spectrum and Compton scattering · See more »
Corona
A corona (Latin, 'crown') is an aura of plasma that surrounds the Sun and other stars.
New!!: Electromagnetic spectrum and Corona · See more »
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.
New!!: Electromagnetic spectrum and Cosmic microwave background · See more »
Cosmic ray
Cosmic rays are high-energy radiation, mainly originating outside the Solar System and even from distant galaxies.
New!!: Electromagnetic spectrum and Cosmic ray · See more »
Decimetre
The decimetre (SI symbol dm) is a unit of length in the metric system, equal to one tenth of a metre (the International System of Units base unit of length), ten centimetres or 1/0.254 (approximately 3.93700787) inches.
New!!: Electromagnetic spectrum and Decimetre · See more »
Demodulation
Demodulation is extracting the original information-bearing signal from a carrier wave.
New!!: Electromagnetic spectrum and Demodulation · See more »
Diathermy
Diathermy is electrically induced heat or the use of high-frequency electromagnetic currents as a form of physical or occupational therapy and in surgical procedures.
New!!: Electromagnetic spectrum and Diathermy · See more »
Digital dividend after digital television transition
The digital dividend refers to the radio spectrum which is released in the process of digital television transition.
New!!: Electromagnetic spectrum and Digital dividend after digital television transition · See more »
DNA
Deoxyribonucleic acid (DNA) is a thread-like chain of nucleotides carrying the genetic instructions used in the growth, development, functioning and reproduction of all known living organisms and many viruses.
New!!: Electromagnetic spectrum and DNA · See more »
DNA repair
DNA repair is a collection of processes by which a cell identifies and corrects damage to the DNA molecules that encode its genome.
New!!: Electromagnetic spectrum and DNA repair · See more »
Doppler effect
The Doppler effect (or the Doppler shift) is the change in frequency or wavelength of a wave in relation to observer who is moving relative to the wave source.
New!!: Electromagnetic spectrum and Doppler effect · See more »
Edward Andrade
Edward Neville da Costa Andrade FRS (27 December 1887 – 6 June 1971) was an English physicist, writer, and poet.
New!!: Electromagnetic spectrum and Edward Andrade · See more »
Electric current
An electric current is a flow of electric charge.
New!!: Electromagnetic spectrum and Electric current · See more »
Electric field
An electric field is a vector field surrounding an electric charge that exerts force on other charges, attracting or repelling them.
New!!: Electromagnetic spectrum and Electric field · See more »
Electroencephalography
Electroencephalography (EEG) is an electrophysiological monitoring method to record electrical activity of the brain.
New!!: Electromagnetic spectrum and Electroencephalography · See more »
Electromagnetic field
An electromagnetic field (also EMF or EM field) is a physical field produced by electrically charged objects.
New!!: Electromagnetic spectrum and Electromagnetic field · See more »
Electromagnetic radiation
In physics, electromagnetic radiation (EM radiation or EMR) refers to the waves (or their quanta, photons) of the electromagnetic field, propagating (radiating) through space-time, carrying electromagnetic radiant energy.
New!!: Electromagnetic spectrum and Electromagnetic radiation · See more »
Electron
The electron is a subatomic particle, symbol or, whose electric charge is negative one elementary charge.
New!!: Electromagnetic spectrum and Electron · See more »
Electronvolt
In physics, the electronvolt (symbol eV, also written electron-volt and electron volt) is a unit of energy equal to approximately joules (symbol J).
New!!: Electromagnetic spectrum and Electronvolt · See more »
Emission spectrum
The emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted due to an atom or molecule making a transition from a high energy state to a lower energy state.
New!!: Electromagnetic spectrum and Emission spectrum · See more »
Energy
In physics, energy is the quantitative property that must be transferred to an object in order to perform work on, or to heat, the object.
New!!: Electromagnetic spectrum and Energy · See more »
Ernest Rutherford
Ernest Rutherford, 1st Baron Rutherford of Nelson, HFRSE LLD (30 August 1871 – 19 October 1937) was a New Zealand-born British physicist who came to be known as the father of nuclear physics.
New!!: Electromagnetic spectrum and Ernest Rutherford · See more »
Exotic atom
An exotic atom is an otherwise normal atom in which one or more sub-atomic particles have been replaced by other particles of the same charge.
New!!: Electromagnetic spectrum and Exotic atom · See more »
Extreme ultraviolet
Extreme ultraviolet radiation (EUV or XUV) or high-energy ultraviolet radiation is electromagnetic radiation in the part of the electromagnetic spectrum spanning wavelengths from 124 nm down to 10 nm, and therefore (by the Planck–Einstein equation) having photons with energies from 10 eV up to 124 eV (corresponding to 124 nm to 10 nm respectively).
New!!: Electromagnetic spectrum and Extreme ultraviolet · See more »
Extremely high frequency
Extremely high frequency (EHF) is the International Telecommunication Union (ITU) designation for the band of radio frequencies in the electromagnetic spectrum from 30 to 300 gigahertz (GHz).
New!!: Electromagnetic spectrum and Extremely high frequency · See more »
Extremely low frequency
Extremely low frequency (ELF) is the ITU designation for electromagnetic radiation (radio waves) with frequencies from 3 to 30 Hz, and corresponding wavelengths of 100,000 to 10,000 kilometers, respectively.
New!!: Electromagnetic spectrum and Extremely low frequency · See more »
Far infrared
Far infrared (FIR) is a region in the infrared spectrum of electromagnetic radiation.
New!!: Electromagnetic spectrum and Far infrared · See more »
Faraday effect
In physics, the Faraday effect or Faraday rotation is a magneto-optical phenomenon—that is, an interaction between light and a magnetic field in a medium.
New!!: Electromagnetic spectrum and Faraday effect · See more »
Femto-
Femto- (symbol f) is a unit prefix in the metric system denoting a factor of 10−15 or.
New!!: Electromagnetic spectrum and Femto- · See more »
Fluorescence
Fluorescence is the emission of light by a substance that has absorbed light or other electromagnetic radiation.
New!!: Electromagnetic spectrum and Fluorescence · See more »
Frame of reference
In physics, a frame of reference (or reference frame) consists of an abstract coordinate system and the set of physical reference points that uniquely fix (locate and orient) the coordinate system and standardize measurements.
New!!: Electromagnetic spectrum and Frame of reference · See more »
Frequency
Frequency is the number of occurrences of a repeating event per unit of time.
New!!: Electromagnetic spectrum and Frequency · See more »
Frequency allocation
Frequency allocation (or spectrum allocation or spectrum management) is the allocation and regulation of the electromagnetic spectrum into radio frequency bands, which is normally done by governments in most countries.
New!!: Electromagnetic spectrum and Frequency allocation · See more »
Gamma ray
A gamma ray or gamma radiation (symbol γ or \gamma), is penetrating electromagnetic radiation arising from the radioactive decay of atomic nuclei.
New!!: Electromagnetic spectrum and Gamma ray · See more »
Gamma-ray burst
In gamma-ray astronomy, gamma-ray bursts (GRBs) are extremely energetic explosions that have been observed in distant galaxies.
New!!: Electromagnetic spectrum and Gamma-ray burst · See more »
Global Positioning System
The Global Positioning System (GPS), originally Navstar GPS, is a satellite-based radionavigation system owned by the United States government and operated by the United States Air Force.
New!!: Electromagnetic spectrum and Global Positioning System · See more »
Gunn diode
A Gunn diode, also known as a transferred electron device (TED), is a form of diode, a two-terminal passive semiconductor electronic component, with negative resistance, used in high-frequency electronics.
New!!: Electromagnetic spectrum and Gunn diode · See more »
Heinrich Hertz
Heinrich Rudolf Hertz (22 February 1857 – 1 January 1894) was a German physicist who first conclusively proved the existence of the electromagnetic waves theorized by James Clerk Maxwell's electromagnetic theory of light.
New!!: Electromagnetic spectrum and Heinrich Hertz · See more »
Hertz
The hertz (symbol: Hz) is the derived unit of frequency in the International System of Units (SI) and is defined as one cycle per second.
New!!: Electromagnetic spectrum and Hertz · See more »
High frequency
High frequency (HF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) between 3 and 30 megahertz (MHz).
New!!: Electromagnetic spectrum and High frequency · See more »
Human skin
The human skin is the outer covering of the body.
New!!: Electromagnetic spectrum and Human skin · See more »
Hydrogen
Hydrogen is a chemical element with symbol H and atomic number 1.
New!!: Electromagnetic spectrum and Hydrogen · See more »
Image sensor
An image sensor or imaging sensor is a sensor that detects and conveys the information that constitutes an image.
New!!: Electromagnetic spectrum and Image sensor · See more »
IMPATT diode
An IMPATT diode (IMPact ionization Avalanche Transit-Time diode) is a form of high-power semiconductor diode used in high-frequency microwave electronics devices.
New!!: Electromagnetic spectrum and IMPATT diode · See more »
Infrared
Infrared radiation (IR) is electromagnetic radiation (EMR) with longer wavelengths than those of visible light, and is therefore generally invisible to the human eye (although IR at wavelengths up to 1050 nm from specially pulsed lasers can be seen by humans under certain conditions). It is sometimes called infrared light.
New!!: Electromagnetic spectrum and Infrared · See more »
Infrared photography
Top: tree photographed in the near infrared range.
New!!: Electromagnetic spectrum and Infrared photography · See more »
Infrared window
The infrared atmospheric window is the overall dynamic property of the earth's atmosphere, taken as a whole at each place and occasion of interest, that lets some infrared radiation from the cloud tops and land-sea surface pass directly to space without intermediate absorption and re-emission, and thus without heating the atmosphere.
New!!: Electromagnetic spectrum and Infrared window · See more »
Innovation, Science and Economic Development Canada
Innovation, Science and Economic Development Canada (Innovation, Sciences et Développement économique Canada), or ISED, formerly Industry Canada, is the department of the Government of Canada with a mandate of fostering a growing, competitive, and knowledge-based Canadian economy.
New!!: Electromagnetic spectrum and Innovation, Science and Economic Development Canada · See more »
International Telecommunication Union
The International Telecommunication Union (ITU; Union Internationale des Télécommunications (UIT)), originally the International Telegraph Union (Union Télégraphique Internationale), is a specialized agency of the United Nations (UN) that is responsible for issues that concern information and communication technologies.
New!!: Electromagnetic spectrum and International Telecommunication Union · See more »
Ionization
Ionization or ionisation, is the process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons to form ions, often in conjunction with other chemical changes.
New!!: Electromagnetic spectrum and Ionization · See more »
Ionizing radiation
Ionizing radiation (ionising radiation) is radiation that carries enough energy to liberate electrons from atoms or molecules, thereby ionizing them.
New!!: Electromagnetic spectrum and Ionizing radiation · See more »
Ionosphere
The ionosphere is the ionized part of Earth's upper atmosphere, from about to altitude, a region that includes the thermosphere and parts of the mesosphere and exosphere.
New!!: Electromagnetic spectrum and Ionosphere · See more »
Irradiation
Irradiation is the process by which an object is exposed to radiation.
New!!: Electromagnetic spectrum and Irradiation · See more »
James Clerk Maxwell
James Clerk Maxwell (13 June 1831 – 5 November 1879) was a Scottish scientist in the field of mathematical physics.
New!!: Electromagnetic spectrum and James Clerk Maxwell · See more »
Johann Wilhelm Ritter
Johann Wilhelm Ritter (16 December 1776 – 23 January 1810) was a German chemist, physicist and philosopher.
New!!: Electromagnetic spectrum and Johann Wilhelm Ritter · See more »
Kilo-
Kilo is a decimal unit prefix in the metric system denoting multiplication by one thousand (103).
New!!: Electromagnetic spectrum and Kilo- · See more »
Kilometre
The kilometre (International spelling as used by the International Bureau of Weights and Measures; SI symbol: km; or) or kilometer (American spelling) is a unit of length in the metric system, equal to one thousand metres (kilo- being the SI prefix for). It is now the measurement unit used officially for expressing distances between geographical places on land in most of the world; notable exceptions are the United States and the road network of the United Kingdom where the statute mile is the official unit used.
New!!: Electromagnetic spectrum and Kilometre · See more »
Klystron
A klystron is a specialized linear-beam vacuum tube, invented in 1937 by American electrical engineers Russell and Sigurd Varian,Pond, Norman H. "The Tube Guys".
New!!: Electromagnetic spectrum and Klystron · See more »
Lambda
Lambda, Λ, λ (uppercase Λ, lowercase λ; λάμ(β)δα lám(b)da) is the 11th letter of the Greek alphabet.
New!!: Electromagnetic spectrum and Lambda · See more »
Light
Light is electromagnetic radiation within a certain portion of the electromagnetic spectrum.
New!!: Electromagnetic spectrum and Light · See more »
List of international common standards
A list of common and basic information standards, that are related by their frequent and widespread use, and which are conventionally used internationally by industry and organizations.
New!!: Electromagnetic spectrum and List of international common standards · See more »
Low frequency
Low frequency (low freq) or LF is the ITU designation for radio frequencies (RF) in the range of 30 kilohertz (kHz)–300 kHz.
New!!: Electromagnetic spectrum and Low frequency · See more »
Luminosity function
A luminosity function or luminous efficiency function describes the average spectral sensitivity of human visual perception of brightness.
New!!: Electromagnetic spectrum and Luminosity function · See more »
Lyman series
In physics and chemistry, the Lyman series is a hydrogen spectral series of transitions and resulting ultraviolet emission lines of the hydrogen atom as an electron goes from n ≥ 2 to n.
New!!: Electromagnetic spectrum and Lyman series · See more »
Magnetic field
A magnetic field is a vector field that describes the magnetic influence of electrical currents and magnetized materials.
New!!: Electromagnetic spectrum and Magnetic field · See more »
Matter
In the classical physics observed in everyday life, matter is any substance that has mass and takes up space by having volume.
New!!: Electromagnetic spectrum and Matter · See more »
Maxwell's equations
Maxwell's equations are a set of partial differential equations that, together with the Lorentz force law, form the foundation of classical electromagnetism, classical optics, and electric circuits.
New!!: Electromagnetic spectrum and Maxwell's equations · See more »
Medium frequency
Medium frequency (MF) is the ITU designation for radio frequencies (RF) in the range of 300 kilohertz (kHz) to 3 megahertz (MHz).
New!!: Electromagnetic spectrum and Medium frequency · See more »
Mega-
Mega is a unit prefix in metric systems of units denoting a factor of one million (106 or 000).
New!!: Electromagnetic spectrum and Mega- · See more »
Metre
The metre (British spelling and BIPM spelling) or meter (American spelling) (from the French unit mètre, from the Greek noun μέτρον, "measure") is the base unit of length in some metric systems, including the International System of Units (SI).
New!!: Electromagnetic spectrum and Metre · See more »
Michael Faraday
Michael Faraday FRS (22 September 1791 – 25 August 1867) was an English scientist who contributed to the study of electromagnetism and electrochemistry.
New!!: Electromagnetic spectrum and Michael Faraday · See more »
Micro-
Micro- (symbol µ) is a unit prefix in the metric system denoting a factor of 10−6 (one millionth).
New!!: Electromagnetic spectrum and Micro- · See more »
Micrometre
The micrometre (International spelling as used by the International Bureau of Weights and Measures; SI symbol: μm) or micrometer (American spelling), also commonly known as a micron, is an SI derived unit of length equaling (SI standard prefix "micro-".
New!!: Electromagnetic spectrum and Micrometre · See more »
Microwave
Microwaves are a form of electromagnetic radiation with wavelengths ranging from one meter to one millimeter; with frequencies between and.
New!!: Electromagnetic spectrum and Microwave · See more »
Microwave oven
A microwave oven (also commonly referred to as a microwave) is an electric oven that heats and cooks food by exposing it to electromagnetic radiation in the microwave frequency range.
New!!: Electromagnetic spectrum and Microwave oven · See more »
Milli-
Milli- (symbol m) is a unit prefix in the metric system denoting a factor of one thousandth (10−3).
New!!: Electromagnetic spectrum and Milli- · See more »
Millimetre
The millimetre (International spelling as used by the International Bureau of Weights and Measures; SI unit symbol mm) or millimeter (American spelling) is a unit of length in the metric system, equal to one thousandth of a metre, which is the SI base unit of length.
New!!: Electromagnetic spectrum and Millimetre · See more »
Mobile phone
A mobile phone, known as a cell phone in North America, is a portable telephone that can make and receive calls over a radio frequency link while the user is moving within a telephone service area.
New!!: Electromagnetic spectrum and Mobile phone · See more »
Modulation
In electronics and telecommunications, modulation is the process of varying one or more properties of a periodic waveform, called the carrier signal, with a modulating signal that typically contains information to be transmitted.
New!!: Electromagnetic spectrum and Modulation · See more »
Mutagen
In genetics, a mutagen is a physical or chemical agent that changes the genetic material, usually DNA, of an organism and thus increases the frequency of mutations above the natural background level.
New!!: Electromagnetic spectrum and Mutagen · See more »
Nano-
Nano- (symbol n) is a unit prefix meaning "one billionth".
New!!: Electromagnetic spectrum and Nano- · See more »
Nanometre
The nanometre (International spelling as used by the International Bureau of Weights and Measures; SI symbol: nm) or nanometer (American spelling) is a unit of length in the metric system, equal to one billionth (short scale) of a metre (m).
New!!: Electromagnetic spectrum and Nanometre · See more »
National Radio Astronomy Observatory
The National Radio Astronomy Observatory (NRAO) is a Federally Funded Research and Development Center of the United States National Science Foundation operated under cooperative agreement by Associated Universities, Inc for the purpose of radio astronomy.
New!!: Electromagnetic spectrum and National Radio Astronomy Observatory · See more »
Near and far field
The near field and far field are regions of the electromagnetic field (EM) around an object, such as a transmitting antenna, or the result of radiation scattering off an object.
New!!: Electromagnetic spectrum and Near and far field · See more »
Nebula
A nebula (Latin for "cloud" or "fog"; pl. nebulae, nebulæ, or nebulas) is an interstellar cloud of dust, hydrogen, helium and other ionized gases.
New!!: Electromagnetic spectrum and Nebula · See more »
Neutron star
A neutron star is the collapsed core of a large star which before collapse had a total of between 10 and 29 solar masses.
New!!: Electromagnetic spectrum and Neutron star · See more »
Nuclear medicine
Nuclear medicine is a medical specialty involving the application of radioactive substances in the diagnosis and treatment of disease.
New!!: Electromagnetic spectrum and Nuclear medicine · See more »
Ofcom
The Office of Communications (Y Swyddfa Gyfathrebiadau), commonly known as Ofcom, is the UK government-approved regulatory and competition authority for the broadcasting, telecommunications and postal industries of the United Kingdom.
New!!: Electromagnetic spectrum and Ofcom · See more »
Optical fiber
An optical fiber or optical fibre is a flexible, transparent fiber made by drawing glass (silica) or plastic to a diameter slightly thicker than that of a human hair.
New!!: Electromagnetic spectrum and Optical fiber · See more »
Optical window
The meaning of this term depends on the context.
New!!: Electromagnetic spectrum and Optical window · See more »
Orders of magnitude (length)
The following are examples of orders of magnitude for different lengths.
New!!: Electromagnetic spectrum and Orders of magnitude (length) · See more »
Oxygen
Oxygen is a chemical element with symbol O and atomic number 8.
New!!: Electromagnetic spectrum and Oxygen · See more »
Ozone layer
The ozone layer or ozone shield is a region of Earth's stratosphere that absorbs most of the Sun's ultraviolet radiation.
New!!: Electromagnetic spectrum and Ozone layer · See more »
Paul Ulrich Villard
Paul Ulrich Villard (28 September 1860 – 13 January 1934) was a French chemist and physicist.
New!!: Electromagnetic spectrum and Paul Ulrich Villard · See more »
Phonon
In physics, a phonon is a collective excitation in a periodic, elastic arrangement of atoms or molecules in condensed matter, like solids and some liquids.
New!!: Electromagnetic spectrum and Phonon · See more »
Photoelectric effect
The photoelectric effect is the emission of electrons or other free carriers when light shines on a material.
New!!: Electromagnetic spectrum and Photoelectric effect · See more »
Photon
The photon is a type of elementary particle, the quantum of the electromagnetic field including electromagnetic radiation such as light, and the force carrier for the electromagnetic force (even when static via virtual particles).
New!!: Electromagnetic spectrum and Photon · See more »
Photon energy
Photon energy is the energy carried by a single photon.
New!!: Electromagnetic spectrum and Photon energy · See more »
Photosynthesis
Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that can later be released to fuel the organisms' activities (energy transformation).
New!!: Electromagnetic spectrum and Photosynthesis · See more »
Pico-
Pico- (symbol p) is a unit prefix in the metric system denoting one trillionth, a factor of 10−12.
New!!: Electromagnetic spectrum and Pico- · See more »
Picometre
The picometre (international spelling as used by the International Bureau of Weights and Measures; SI symbol: pm) or picometer (American spelling) is a unit of length in the metric system, equal to, or one trillionth of a metre, which is the SI base unit of length.
New!!: Electromagnetic spectrum and Picometre · See more »
Pitch (resin)
Pitch is a name for any of a number of viscoelastic polymers.
New!!: Electromagnetic spectrum and Pitch (resin) · See more »
Planck constant
The Planck constant (denoted, also called Planck's constant) is a physical constant that is the quantum of action, central in quantum mechanics.
New!!: Electromagnetic spectrum and Planck constant · See more »
Planck length
In physics, the Planck length, denoted, is a unit of length, equal to metres.
New!!: Electromagnetic spectrum and Planck length · See more »
Plasma oscillation
Plasma oscillations, also known as Langmuir waves (after Irving Langmuir), are rapid oscillations of the electron density in conducting media such as plasmas or metals in the ultraviolet region.
New!!: Electromagnetic spectrum and Plasma oscillation · See more »
Positron emission tomography
Positron-emission tomography (PET) is a nuclear medicine functional imaging technique that is used to observe metabolic processes in the body as an aid to the diagnosis of disease.
New!!: Electromagnetic spectrum and Positron emission tomography · See more »
Pyrimidine dimer
Pyrimidine dimers are molecular lesions formed from thymine or cytosine bases in DNA via photochemical reactions.
New!!: Electromagnetic spectrum and Pyrimidine dimer · See more »
Quantum
In physics, a quantum (plural: quanta) is the minimum amount of any physical entity (physical property) involved in an interaction.
New!!: Electromagnetic spectrum and Quantum · See more »
Radar
Radar is an object-detection system that uses radio waves to determine the range, angle, or velocity of objects.
New!!: Electromagnetic spectrum and Radar · See more »
Radiant energy
In physics, and in particular as measured by radiometry, radiant energy is the energy of electromagnetic and gravitational radiation.
New!!: Electromagnetic spectrum and Radiant energy · See more »
Radiation
In physics, radiation is the emission or transmission of energy in the form of waves or particles through space or through a material medium.
New!!: Electromagnetic spectrum and Radiation · See more »
Radiation therapy
Radiation therapy or radiotherapy, often abbreviated RT, RTx, or XRT, is therapy using ionizing radiation, generally as part of cancer treatment to control or kill malignant cells and normally delivered by a linear accelerator.
New!!: Electromagnetic spectrum and Radiation therapy · See more »
Radio
Radio is the technology of using radio waves to carry information, such as sound, by systematically modulating properties of electromagnetic energy waves transmitted through space, such as their amplitude, frequency, phase, or pulse width.
New!!: Electromagnetic spectrum and Radio · See more »
Radio broadcasting
Radio broadcasting is transmission by radio waves intended to reach a wide audience.
New!!: Electromagnetic spectrum and Radio broadcasting · See more »
Radio receiver
In radio communications, a radio receiver (receiver or simply radio) is an electronic device that receives radio waves and converts the information carried by them to a usable form.
New!!: Electromagnetic spectrum and Radio receiver · See more »
Radio spectrum
The radio spectrum is the part of the electromagnetic spectrum with frequencies from 3 Hz to 3 000 GHz (3 THz).
New!!: Electromagnetic spectrum and Radio spectrum · See more »
Radio wave
Radio waves are a type of electromagnetic radiation with wavelengths in the electromagnetic spectrum longer than infrared light.
New!!: Electromagnetic spectrum and Radio wave · See more »
Radio window
The radio window is the range of frequencies of electromagnetic radiation that the earth's atmosphere lets through.
New!!: Electromagnetic spectrum and Radio window · See more »
Radioactive decay
Radioactive decay (also known as nuclear decay or radioactivity) is the process by which an unstable atomic nucleus loses energy (in terms of mass in its rest frame) by emitting radiation, such as an alpha particle, beta particle with neutrino or only a neutrino in the case of electron capture, gamma ray, or electron in the case of internal conversion.
New!!: Electromagnetic spectrum and Radioactive decay · See more »
Radiography
Radiography is an imaging technique using X-rays to view the internal form of an object.
New!!: Electromagnetic spectrum and Radiography · See more »
Radiolocation
Radiolocating is the process of finding the location of something through the use of radio waves.
New!!: Electromagnetic spectrum and Radiolocation · See more »
Radionuclide
A radionuclide (radioactive nuclide, radioisotope or radioactive isotope) is an atom that has excess nuclear energy, making it unstable.
New!!: Electromagnetic spectrum and Radionuclide · See more »
Radium
Radium is a chemical element with symbol Ra and atomic number 88.
New!!: Electromagnetic spectrum and Radium · See more »
Rainbow
A rainbow is a meteorological phenomenon that is caused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky.
New!!: Electromagnetic spectrum and Rainbow · See more »
Redshift
In physics, redshift happens when light or other electromagnetic radiation from an object is increased in wavelength, or shifted to the red end of the spectrum.
New!!: Electromagnetic spectrum and Redshift · See more »
Reflection (physics)
Reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated.
New!!: Electromagnetic spectrum and Reflection (physics) · See more »
Refraction
Refraction is the change in direction of wave propagation due to a change in its transmission medium.
New!!: Electromagnetic spectrum and Refraction · See more »
Remote control
In electronics, a remote control or clicker is a component of an electronic device used to operate the device from a distance, usually wirelessly.
New!!: Electromagnetic spectrum and Remote control · See more »
Resonator
A resonator is a device or system that exhibits resonance or resonant behavior, that is, it naturally oscillates at some frequencies, called its resonant frequencies, with greater amplitude than at others.
New!!: Electromagnetic spectrum and Resonator · See more »
Signal
A signal as referred to in communication systems, signal processing, and electrical engineering is a function that "conveys information about the behavior or attributes of some phenomenon".
New!!: Electromagnetic spectrum and Signal · See more »
Skin cancer
Skin cancers are cancers that arise from the skin.
New!!: Electromagnetic spectrum and Skin cancer · See more »
Solid-state electronics
Solid-state electronics means semiconductor electronics; electronic equipment using semiconductor devices such as semiconductor diodes, transistors, and integrated circuits (ICs).
New!!: Electromagnetic spectrum and Solid-state electronics · See more »
Spectroscopy
Spectroscopy is the study of the interaction between matter and electromagnetic radiation.
New!!: Electromagnetic spectrum and Spectroscopy · See more »
Spectrum
A spectrum (plural spectra or spectrums) is a condition that is not limited to a specific set of values but can vary, without steps, across a continuum.
New!!: Electromagnetic spectrum and Spectrum · See more »
Speed of light
The speed of light in vacuum, commonly denoted, is a universal physical constant important in many areas of physics.
New!!: Electromagnetic spectrum and Speed of light · See more »
Submillimetre astronomy
Submillimetre astronomy or submillimeter astronomy (see spelling differences) is the branch of observational astronomy that is conducted at submillimetre wavelengths (i.e., terahertz radiation) of the electromagnetic spectrum.
New!!: Electromagnetic spectrum and Submillimetre astronomy · See more »
Sun
The Sun is the star at the center of the Solar System.
New!!: Electromagnetic spectrum and Sun · See more »
Sunburn
Sunburn is a form of radiation burn that affects living tissue, such as skin, that results from an overexposure to ultraviolet (UV) radiation, commonly from the sun.
New!!: Electromagnetic spectrum and Sunburn · See more »
Super high frequency
Super high frequency (SHF) is the ITU designation for radio frequencies (RF) in the range between 3 and 30 gigahertz (GHz).
New!!: Electromagnetic spectrum and Super high frequency · See more »
Super low frequency
Super low frequency (SLF) is electromagnetic waves (radio waves) in the frequency range between 30 hertz and 300 hertz.
New!!: Electromagnetic spectrum and Super low frequency · See more »
Television
Television (TV) is a telecommunication medium used for transmitting moving images in monochrome (black and white), or in colour, and in two or three dimensions and sound.
New!!: Electromagnetic spectrum and Television · See more »
Terahertz radiation
Terahertz radiation – also known as submillimeter radiation, terahertz waves, tremendously high frequency (THF), T-rays, T-waves, T-light, T-lux or THz – consists of electromagnetic waves within the ITU-designated band of frequencies from 0.3 to 3 terahertz (THz; 1012 Hz).
New!!: Electromagnetic spectrum and Terahertz radiation · See more »
Thorium
Thorium is a weakly radioactive metallic chemical element with symbol Th and atomic number 90.
New!!: Electromagnetic spectrum and Thorium · See more »
Transmission line
In communications and electronic engineering, a transmission line is a specialized cable or other structure designed to conduct alternating current of radio frequency, that is, currents with a frequency high enough that their wave nature must be taken into account.
New!!: Electromagnetic spectrum and Transmission line · See more »
Transmission medium
A transmission medium is a material substance (solid, liquid, gas, or plasma) that can propagate energy waves.
New!!: Electromagnetic spectrum and Transmission medium · See more »
Transmitter
In electronics and telecommunications, a transmitter or radio transmitter is an electronic device which produces radio waves with an antenna.
New!!: Electromagnetic spectrum and Transmitter · See more »
Two-way radio
A two-way radio is a radio that can do both transmit and receive a signal (a transceiver), unlike a broadcast receiver which only receives content.
New!!: Electromagnetic spectrum and Two-way radio · See more »
Ultra high frequency
Ultra high frequency (UHF) is the ITU designation for radio frequencies in the range between 300 megahertz (MHz) and 3 gigahertz (GHz), also known as the decimetre band as the wavelengths range from one meter to one decimeter.
New!!: Electromagnetic spectrum and Ultra high frequency · See more »
Ultra low frequency
Ultra low frequency (ULF) is the ITU designation for the frequency range of electromagnetic waves between 300 hertz and 3 kilohertz.
New!!: Electromagnetic spectrum and Ultra low frequency · See more »
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.
New!!: Electromagnetic spectrum and Ultraviolet · See more »
United States Department of Commerce
The United States Department of Commerce is the Cabinet department of the United States government concerned with promoting economic growth.
New!!: Electromagnetic spectrum and United States Department of Commerce · See more »
United States Department of Defense
The Department of Defense (DoD, USDOD, or DOD) is an executive branch department of the federal government of the United States charged with coordinating and supervising all agencies and functions of the government concerned directly with national security and the United States Armed Forces.
New!!: Electromagnetic spectrum and United States Department of Defense · See more »
Universe
The Universe is all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy.
New!!: Electromagnetic spectrum and Universe · See more »
University of California, Davis
The University of California, Davis (also referred to as UCD, UC Davis, or Davis), is a public research university and land-grant university as well as one of the 10 campuses of the University of California (UC) system.
New!!: Electromagnetic spectrum and University of California, Davis · See more »
V band
The V band ("vee-band") is a standard designation by the Institute of Electrical and Electronic Engineers (IEEE) for a band of frequencies in the microwave portion of the electromagnetic spectrum ranging from 40 to 75 gigahertz (GHz).
New!!: Electromagnetic spectrum and V band · See more »
Very high frequency
Very high frequency (VHF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) from 30 to 300 megahertz (MHz), with corresponding wavelengths of ten to one meter.
New!!: Electromagnetic spectrum and Very high frequency · See more »
Very low frequency
Very low frequency or VLF is the ITU designation for radio frequencies (RF) in the range of 3 to 30 kilohertz (kHz), corresponding to wavelengths from 100 to 10 kilometers, respectively.
New!!: Electromagnetic spectrum and Very low frequency · See more »
Virtual particle
In physics, a virtual particle is a transient fluctuation that exhibits some of the characteristics of an ordinary particle, but whose existence is limited by the uncertainty principle.
New!!: Electromagnetic spectrum and Virtual particle · See more »
Visible spectrum
The visible spectrum is the portion of the electromagnetic spectrum that is visible to the human eye.
New!!: Electromagnetic spectrum and Visible spectrum · See more »
Visual perception
Visual perception is the ability to interpret the surrounding environment using light in the visible spectrum reflected by the objects in the environment.
New!!: Electromagnetic spectrum and Visual perception · See more »
Visual system
The visual system is the part of the central nervous system which gives organisms the ability to process visual detail, as well as enabling the formation of several non-image photo response functions.
New!!: Electromagnetic spectrum and Visual system · See more »
Voice frequency
A voice frequency (VF) or voice band is one of the frequencies, within part of the audio range, that is being used for the transmission of speech.
New!!: Electromagnetic spectrum and Voice frequency · See more »
W band
The W band of the microwave part of the electromagnetic spectrum ranges from 75 to 110 GHz, wavelength ≈2.7–4 mm.
New!!: Electromagnetic spectrum and W band · See more »
Waveguide
A waveguide is a structure that guides waves, such as electromagnetic waves or sound, with minimal loss of energy by restricting expansion to one dimension or two.
New!!: Electromagnetic spectrum and Waveguide · See more »
Wavelength
In physics, the wavelength is the spatial period of a periodic wave—the distance over which the wave's shape repeats.
New!!: Electromagnetic spectrum and Wavelength · See more »
Wi-Fi
Wi-Fi or WiFi is technology for radio wireless local area networking of devices based on the IEEE 802.11 standards.
New!!: Electromagnetic spectrum and Wi-Fi · See more »
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.
New!!: Electromagnetic spectrum and Wilhelm Röntgen · See more »
William Henry Bragg
Sir William Henry Bragg (2 July 1862 – 12 March 1942) was a British physicist, chemist, mathematician and active sportsman who uniquelyThis is still a unique accomplishment, because no other parent-child combination has yet shared a Nobel Prize (in any field).
New!!: Electromagnetic spectrum and William Henry Bragg · See more »
William Herschel
Frederick William Herschel, (Friedrich Wilhelm Herschel; 15 November 1738 – 25 August 1822) was a German-born British astronomer, composer and brother of fellow astronomer Caroline Herschel, with whom he worked.
New!!: Electromagnetic spectrum and William Herschel · See more »
Wireless network
A wireless network is a computer network that uses wireless data connections between network nodes.
New!!: Electromagnetic spectrum and Wireless network · See more »
Wireless telegraphy
Wireless telegraphy is the transmission of telegraphy signals from one point to another by means of an electromagnetic, electrostatic or magnetic field, or by electrical current through the earth or water.
New!!: Electromagnetic spectrum and Wireless telegraphy · See more »
X-ray
X-rays make up X-radiation, a form of electromagnetic radiation.
New!!: Electromagnetic spectrum and X-ray · See more »
X-ray telescope
An X-ray telescope (XRT) is a telescope that is designed to observe remote objects in the X-ray spectrum.
New!!: Electromagnetic spectrum and X-ray telescope · See more »
Redirects here:
EM Spectrum, EM spectrum, Electomagnetic spectrum, Electro magnetic spectrum, Electro-magnetic spectrum, Electrocmagnetic spectrum, Electromagentic spectra, Electromagnetic Spectrum, Electromagnetic frequency spectrum, Em spectrum, Invisible light (physics), Light spectrum, Radiation spectrum, Solar Light, Spectral range, Spectrum of light.
References
[1] https://en.wikipedia.org/wiki/Electromagnetic_spectrum