168 relations: Acoustic resonance, Active laser medium, Aerodynamics, American Journal of Physics, Amplitude, Angular momentum, Antiresonance, Atom, Atomic clock, Atomic nucleus, Atomic spacing, Attenuation, Autopilot, Balance wheel, Bandwidth (signal processing), Bay of Fundy, Brian Greene, Bridge, Cauchy distribution, Celestial mechanics, Center frequency, Classical physics, Clearing the neighbourhood, Clock, Coherence (physics), Complex number, Condensed matter physics, Construction, Crystallography, Cymatics, Damping ratio, Definition of planet, Degrees of freedom (mechanics), Dimensionless quantity, Double pendulum, Earthquake engineering, Electric dipole spin resonance, Electrical engineering, Electrical impedance, Electrical network, Electrical resonance, Electromagnetic radiation, Electron, Electron paramagnetic resonance, Engineer, Europa (moon), Feedback, Flute, Formant, Frederick Terman, ..., Frequency, Friction idiophone, Fundamental frequency, Gamma ray, Ganymede (moon), Gas giant, Glass, Guided-mode resonance, Guido of Arezzo, Harmonic oscillator, Harry F. Olson, Hertz, Hinge, Integer, Interferometry, International Space Station, Io (moon), Jupiter, Laser, Latin, LC circuit, Light, Limbic resonance, Longitudinal mode, Magnetic moment, Magnetic resonance imaging, Magnetism, Mössbauer effect, Mechanical resonance, Mechanics, Metal, Microwave, Mirror, Molecular physics, Musical instrument, Natural frequency, Natural satellite, Neptune, Nonlinear resonance, Normal mode, Nova (TV series), Nuclear magnetic resonance, Nuclear magnetic resonance spectroscopy, Nucleon, Octave (electronics), Optical cavity, Optical parametric oscillator, Optical ring resonators, Optical theorem, Orbit, Orbital period, Orbital resonance, Organ pipe, Oscillation, Oscillator linewidth, Oscillator phase noise, Overtone, Paramagnetism, PBS, Pendulum, Periodic function, Physics, Pluto, Positive feedback, Propagator, Proportionality (mathematics), Q factor, Quantum field theory, Quantum mechanics, Quartz, Quartz clock, Radio, Recoil, Resonance (particle physics), Resonator, Rings of Saturn, RLC circuit, Robert H. Scanlan, Rocket engine, Saturn, Schumann resonances, Seismology, Selectivity (electronic), Shock mount, Simple harmonic motion, Sine wave, Solar System, Solfège, Sound, Sound energy, Spectral line, Spectroscopy, Standing wave, Stochastic resonance, String resonance, String vibration, Surface plasmon resonance, Swing (seat), Sympathetic string, Tacoma Narrows Bridge (1940), Taipei 101, Television, The Elegant Universe, Tidal resonance, Transfer function, Transformer types, Transverse mode, Tuned mass damper, Tuning fork, Ut queant laxis, Vibration, Violin, Vocal tract, Watch, Wave, Wave function, Whispering gallery, Wood. Expand index (118 more) » « Shrink index
Acoustic resonance is a phenomenon where acoustic systems amplify sound waves whose frequency matches one of its own natural frequencies of vibration (its resonance frequencies).
The active laser medium (also called gain medium or lasing medium) is the source of optical gain within a laser.
Aerodynamics, from Greek ἀήρ aer (air) + δυναμική (dynamics), is the study of the motion of air, particularly its interaction with a solid object, such as an airplane wing.
The American Journal of Physics is a monthly, peer-reviewed scientific journal published by the American Association of Physics Teachers and the American Institute of Physics.
The amplitude of a periodic variable is a measure of its change over a single period (such as time or spatial period).
In physics, angular momentum (rarely, moment of momentum or rotational momentum) is the rotational equivalent of linear momentum.
In the physics of coupled oscillators, antiresonance, by analogy with resonance, is a pronounced minimum in the amplitude of one oscillator at a particular frequency, accompanied by a large shift in its oscillation phase.
An atom is the smallest constituent unit of ordinary matter that has the properties of a chemical element.
An atomic clock is a clock device that uses an electron transition frequency in the microwave, optical, or ultraviolet region of the electromagnetic spectrum of atoms as a frequency standard for its timekeeping element.
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.
Atomic spacing refers to the distance between the nuclei of atoms in a material.
In physics, attenuation or, in some contexts, extinction is the gradual loss of flux intensity through a medium.
An autopilot is a system used to control the trajectory of an aircraft without constant 'hands-on' control by a human operator being required.
A balance wheel, or balance, is the timekeeping device used in mechanical watches and some clocks, analogous to the pendulum in a pendulum clock.
Bandwidth is the difference between the upper and lower frequencies in a continuous band of frequencies.
The Bay of Fundy (or Fundy Bay; Baie de Fundy) is a bay between the Canadian provinces of New Brunswick and Nova Scotia, with a small portion touching the US state of Maine.
Brian Randolph Greene (born February 9, 1963) is an American theoretical physicist, mathematician, and string theorist.
A bridge is a structure built to span physical obstacles without closing the way underneath such as a body of water, valley, or road, for the purpose of providing passage over the obstacle.
The Cauchy distribution, named after Augustin Cauchy, is a continuous probability distribution.
Celestial mechanics is the branch of astronomy that deals with the motions of celestial objects.
In electrical engineering and telecommunications, the center frequency of a filter or channel is a measure of a central frequency between the upper and lower cutoff frequencies.
Classical physics refers to theories of physics that predate modern, more complete, or more widely applicable theories.
"Clearing the neighbourhood around its orbit" is a criterion for a celestial body to be considered a planet in the Solar System.
A clock is an instrument to measure, keep, and indicate time.
In physics, two wave sources are perfectly coherent if they have a constant phase difference and the same frequency, and the same waveform.
A complex number is a number that can be expressed in the form, where and are real numbers, and is a solution of the equation.
Condensed matter physics is the field of physics that deals with the macroscopic and microscopic physical properties of matter.
Construction is the process of constructing a building or infrastructure.
Crystallography is the experimental science of determining the arrangement of atoms in crystalline solids (see crystal structure).
Cymatics, from κῦμα, meaning "wave", is a subset of modal vibrational phenomena.
Damping is an influence within or upon an oscillatory system that has the effect of reducing, restricting or preventing its oscillations.
The definition of planet, since the word was coined by the ancient Greeks, has included within its scope a wide range of celestial bodies.
In physics, the degree of freedom (DOF) of a mechanical system is the number of independent parameters that define its configuration.
In dimensional analysis, a dimensionless quantity is a quantity to which no physical dimension is assigned.
In physics and mathematics, in the area of dynamical systems, a double pendulum is a pendulum with another pendulum attached to its end, and is a simple physical system that exhibits rich dynamic behavior with a strong sensitivity to initial conditions.
Earthquake engineering is an interdisciplinary branch of engineering that designs and analyzes structures, such as buildings and bridges, with earthquakes in mind.
Electric dipole spin resonance (EDSR) is a method to control the magnetic moments inside a material using quantum mechanical effects like the spin–orbit interaction.
Electrical engineering is a professional engineering discipline that generally deals with the study and application of electricity, electronics, and electromagnetism.
Electrical impedance is the measure of the opposition that a circuit presents to a current when a voltage is applied.
An electrical network is an interconnection of electrical components (e.g. batteries, resistors, inductors, capacitors, switches) or a model of such an interconnection, consisting of electrical elements (e.g. voltage sources, current sources, resistances, inductances, capacitances).
Electrical resonance occurs in an electric circuit at a particular resonant frequency when the imaginary parts of impedances or admittances of circuit elements cancel each other.
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.
The electron is a subatomic particle, symbol or, whose electric charge is negative one elementary charge.
Electron paramagnetic resonance (EPR) or electron spin resonance (ESR) spectroscopy is a method for studying materials with unpaired electrons.
Engineers, as practitioners of engineering, are people who invent, design, analyze, build, and test machines, systems, structures and materials to fulfill objectives and requirements while considering the limitations imposed by practicality, regulation, safety, and cost.
Europa or as Ευρώπη (Jupiter II) is the smallest of the four Galilean moons orbiting Jupiter, and the sixth-closest to the planet.
Feedback occurs when outputs of a system are routed back as inputs as part of a chain of cause-and-effect that forms a circuit or loop.
The flute is a family of musical instruments in the woodwind group.
A formant, as defined by James Jeans, is a harmonic of a note that is augmented by a resonance.
Frederick Emmons Terman (June 7, 1900 – December 19, 1982) was an American professor and academic administrator.
Frequency is the number of occurrences of a repeating event per unit of time.
Friction idiophones is designation 13 in the Hornbostel-Sachs system of musical instrument classification.
The fundamental frequency, often referred to simply as the fundamental, is defined as the lowest frequency of a periodic waveform.
A gamma ray or gamma radiation (symbol γ or \gamma), is penetrating electromagnetic radiation arising from the radioactive decay of atomic nuclei.
Ganymede (Jupiter III) is the largest and most massive moon of Jupiter and in the Solar System.
A gas giant is a giant planet composed mainly of hydrogen and helium.
Glass is a non-crystalline amorphous solid that is often transparent and has widespread practical, technological, and decorative usage in, for example, window panes, tableware, and optoelectronics.
Guided-mode resonance or waveguide-mode resonance is a phenomenon wherein the guided modes of an optical waveguide can be excited and simultaneously extracted by the introduction of a phase-matching element, such as a diffraction grating or prism.
Guido of Arezzo (also Guido Aretinus, Guido Aretino, Guido da Arezzo, Guido Monaco, or Guido d'Arezzo, or Guy of Arezzo also Guy d'Arezzo) (991/992 – after 1033) was an Italian music theorist of the Medieval era.
In classical mechanics, a harmonic oscillator is a system that, when displaced from its equilibrium position, experiences a restoring force, F, proportional to the displacement, x: where k is a positive constant.
Harry Ferdinand Olson (December 28, 1901 – April 1, 1982) was a prominent engineer at RCA Victor and a pioneer in the field of 20th century acoustical engineering.
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.
A hinge is a mechanical bearing that connects two solid objects, typically allowing only a limited angle of rotation between them.
An integer (from the Latin ''integer'' meaning "whole")Integer 's first literal meaning in Latin is "untouched", from in ("not") plus tangere ("to touch").
Interferometry is a family of techniques in which waves, usually electromagnetic waves, are superimposed causing the phenomenon of interference in order to extract information.
The International Space Station (ISS) is a space station, or a habitable artificial satellite, in low Earth orbit.
Io (Jupiter I) is the innermost of the four Galilean moons of the planet Jupiter.
Jupiter is the fifth planet from the Sun and the largest in the Solar System.
A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation.
Latin (Latin: lingua latīna) is a classical language belonging to the Italic branch of the Indo-European languages.
An LC circuit, also called a resonant circuit, tank circuit, or tuned circuit, is an electric circuit consisting of an inductor, represented by the letter L, and a capacitor, represented by the letter C, connected together.
Light is electromagnetic radiation within a certain portion of the electromagnetic spectrum.
Limbic resonance is the idea that the capacity for sharing deep emotional states arises from the limbic system of the brain.
A longitudinal mode of a resonant cavity is a particular standing wave pattern formed by waves confined in the cavity.
The magnetic moment is a quantity that represents the magnetic strength and orientation of a magnet or other object that produces a magnetic field.
Magnetic resonance imaging (MRI) is a medical imaging technique used in radiology to form pictures of the anatomy and the physiological processes of the body in both health and disease.
Magnetism is a class of physical phenomena that are mediated by magnetic fields.
The Mössbauer effect, or recoilless nuclear resonance fluorescence, is a physical phenomenon discovered by Rudolf Mössbauer in 1958.
Mechanical resonance is the tendency of a mechanical system to respond at greater amplitude when the frequency of its oscillations matches the system's natural frequency of vibration (its resonance frequency or resonant frequency) than it does at other frequencies.
Mechanics (Greek μηχανική) is that area of science concerned with the behaviour of physical bodies when subjected to forces or displacements, and the subsequent effects of the bodies on their environment.
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.
Microwaves are a form of electromagnetic radiation with wavelengths ranging from one meter to one millimeter; with frequencies between and.
A mirror is an object that reflects light in such a way that, for incident light in some range of wavelengths, the reflected light preserves many or most of the detailed physical characteristics of the original light, called specular reflection.
Molecular physics is the study of the physical properties of molecules, the chemical bonds between atoms as well as the molecular dynamics.
A musical instrument is an instrument created or adapted to make musical sounds.
Natural frequency is the frequency at which a system tends to oscillate in the absence of any driving or damping force.
A natural satellite or moon is, in the most common usage, an astronomical body that orbits a planet or minor planet (or sometimes another small Solar System body).
Neptune is the eighth and farthest known planet from the Sun in the Solar System.
In physics, nonlinear resonance is the occurrence of resonance in a nonlinear system.
A normal mode of an oscillating system is a pattern of motion in which all parts of the system move sinusoidally with the same frequency and with a fixed phase relation.
Nova (stylized NOVΛ) is an American popular science television series produced by WGBH Boston.
Nuclear magnetic resonance (NMR) is a physical phenomenon in which nuclei in a magnetic field absorb and re-emit electromagnetic radiation.
Nuclear magnetic resonance spectroscopy, most commonly known as NMR spectroscopy or magnetic resonance spectroscopy (MRS), is a spectroscopic technique to observe local magnetic fields around atomic nuclei.
In chemistry and physics, a nucleon is either a proton or a neutron, considered in its role as a component of an atomic nucleus.
In electronics, an octave (symbol oct) is a doubling or halving of a frequency.
An optical cavity, resonating cavity or optical resonator is an arrangement of mirrors that forms a standing wave cavity resonator for light waves.
An optical parametric oscillator (OPO) is a parametric oscillator that oscillates at optical frequencies.
An optical ring resonator is a set of waveguides in which at least one is a closed loop coupled to some sort of light input and output.
In physics, the optical theorem is a general law of wave scattering theory, which relates the forward scattering amplitude to the total cross section of the scatterer.
In physics, an orbit is the gravitationally curved trajectory of an object, such as the trajectory of a planet around a star or a natural satellite around a planet.
The orbital period is the time a given astronomical object takes to complete one orbit around another object, and applies in astronomy usually to planets or asteroids orbiting the Sun, moons orbiting planets, exoplanets orbiting other stars, or binary stars.
In celestial mechanics, an orbital resonance occurs when orbiting bodies exert a regular, periodic gravitational influence on each other, usually because their orbital periods are related by a ratio of small integers.
An organ pipe is a sound-producing element of the pipe organ that resonates at a specific pitch when pressurized air (commonly referred to as wind) is driven through it.
Oscillation is the repetitive variation, typically in time, of some measure about a central value (often a point of equilibrium) or between two or more different states.
The concept of a linewidth is borrowed from laser spectroscopy.
0,..., t6) one can see that the deviation in amplitude dissipates while the deviation in phase does not.| --> Oscillators inherently produce high levels of phase noise. That noise increases at frequencies close to the oscillation frequency or its harmonics. With the noise being close to the oscillation frequency, it cannot be removed by filtering without also removing the oscillation signal. And since it is predominantly in the phase, it can be removed without any limiter. All well-designed nonlinear oscillators have stable limit cycles, meaning that if perturbed, the oscillator will naturally return to its limit cycle. This is depicted in the figure on the right (removed due to unknown copyright status). Here the stable limit cycle is shown in state space as a closed orbit (the ellipse). When perturbed, the oscillator responds by spiraling back into the limit cycle. However, by observing the time stamps, it is easy to see that while the oscillation returns to its stable limit cycle, it does not return at the same phase. This is because the oscillator is autonomous; it has no stable time reference. The phase is free to drift. As a result, any perturbation of the oscillator causes the phase to drift, which explains why the noise produced by an oscillator is predominantly in phase.
An overtone is any frequency greater than the fundamental frequency of a sound.
Paramagnetism is a form of magnetism whereby certain materials are weakly attracted by an externally applied magnetic field, and form internal, induced magnetic fields in the direction of the applied magnetic field.
The Public Broadcasting Service (PBS) is an American public broadcaster and television program distributor.
A pendulum is a weight suspended from a pivot so that it can swing freely.
In mathematics, a periodic function is a function that repeats its values in regular intervals or periods.
Physics (from knowledge of nature, from φύσις phýsis "nature") is the natural science that studies matterAt the start of The Feynman Lectures on Physics, Richard Feynman offers the atomic hypothesis as the single most prolific scientific concept: "If, in some cataclysm, all scientific knowledge were to be destroyed one sentence what statement would contain the most information in the fewest words? I believe it is that all things are made up of atoms – little particles that move around in perpetual motion, attracting each other when they are a little distance apart, but repelling upon being squeezed into one another..." and its motion and behavior through space and time and that studies the related entities of energy and force."Physical science is that department of knowledge which relates to the order of nature, or, in other words, to the regular succession of events." Physics is one of the most fundamental scientific disciplines, and its main goal is to understand how the universe behaves."Physics is one of the most fundamental of the sciences. Scientists of all disciplines use the ideas of physics, including chemists who study the structure of molecules, paleontologists who try to reconstruct how dinosaurs walked, and climatologists who study how human activities affect the atmosphere and oceans. Physics is also the foundation of all engineering and technology. No engineer could design a flat-screen TV, an interplanetary spacecraft, or even a better mousetrap without first understanding the basic laws of physics. (...) You will come to see physics as a towering achievement of the human intellect in its quest to understand our world and ourselves."Physics is an experimental science. Physicists observe the phenomena of nature and try to find patterns that relate these phenomena.""Physics is the study of your world and the world and universe around you." Physics is one of the oldest academic disciplines and, through its inclusion of astronomy, perhaps the oldest. Over the last two millennia, physics, chemistry, biology, and certain branches of mathematics were a part of natural philosophy, but during the scientific revolution in the 17th century, these natural sciences emerged as unique research endeavors in their own right. Physics intersects with many interdisciplinary areas of research, such as biophysics and quantum chemistry, and the boundaries of physics are not rigidly defined. New ideas in physics often explain the fundamental mechanisms studied by other sciences and suggest new avenues of research in academic disciplines such as mathematics and philosophy. Advances in physics often enable advances in new technologies. For example, advances in the understanding of electromagnetism and nuclear physics led directly to the development of new products that have dramatically transformed modern-day society, such as television, computers, domestic appliances, and nuclear weapons; advances in thermodynamics led to the development of industrialization; and advances in mechanics inspired the development of calculus.
Pluto (minor planet designation: 134340 Pluto) is a dwarf planet in the Kuiper belt, a ring of bodies beyond Neptune.
Positive feedback is a process that occurs in a feedback loop in which the effects of a small disturbance on a system include an increase in the magnitude of the perturbation.
In quantum mechanics and quantum field theory, the propagator is a function that specifies the probability amplitude for a particle to travel from one place to another in a given time, or to travel with a certain energy and momentum.
In mathematics, two variables are proportional if there is always a constant ratio between them.
In physics and engineering the quality factor or Q factor is a dimensionless parameter that describes how underdamped an oscillator or resonator is, and characterizes a resonator's bandwidth relative to its centre frequency.
In theoretical physics, quantum field theory (QFT) is the theoretical framework for constructing quantum mechanical models of subatomic particles in particle physics and quasiparticles in condensed matter physics.
Quantum mechanics (QM; also known as quantum physics, quantum theory, the wave mechanical model, or matrix mechanics), including quantum field theory, is a fundamental theory in physics which describes nature at the smallest scales of energy levels of atoms and subatomic particles.
Quartz is a mineral composed of silicon and oxygen atoms in a continuous framework of SiO4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO2.
A quartz clock is a clock that uses an electronic oscillator that is regulated by a quartz crystal to keep time.
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.
Recoil (often called knockback, kickback or simply kick) is the backward movement of a gun when it is discharged.
In particle physics, a resonance is the peak located around a certain energy found in differential cross sections of scattering experiments.
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.
The rings of Saturn are the most extensive ring system of any planet in the Solar System.
An RLC circuit is an electrical circuit consisting of a resistor (R), an inductor (L), and a capacitor (C), connected in series or in parallel.
Robert H. Scanlan (1914-2001) was a civil and aeronautical engineer who came to be widely recognized as a leader in the analysis of wind effects on large structures.
A rocket engine uses stored rocket propellant mass for forming its high-speed propulsive jet.
Saturn is the sixth planet from the Sun and the second-largest in the Solar System, after Jupiter.
The Schumann resonances (SR) are a set of spectrum peaks in the extremely low frequency (ELF) portion of the Earth's electromagnetic field spectrum.
Seismology (from Ancient Greek σεισμός (seismós) meaning "earthquake" and -λογία (-logía) meaning "study of") is the scientific study of earthquakes and the propagation of elastic waves through the Earth or through other planet-like bodies.
Selectivity is a measure of the performance of a radio receiver to respond only to the radio signal it is tuned to (such as a radio station) and reject other signals nearby in frequency, such as another broadcast on an adjacent channel.
In a variety of applications, a shock mount or isolation mount is a mechanical fastener that connects two parts elastically.
In mechanics and physics, simple harmonic motion is a special type of periodic motion or oscillation motion where the restoring force is directly proportional to the displacement and acts in the direction opposite to that of displacement.
A sine wave or sinusoid is a mathematical curve that describes a smooth periodic oscillation.
The Solar SystemCapitalization of the name varies.
In music, solfège or solfeggio, also called sol-fa, solfa, solfeo, among many names, is a music education method used to teach pitch and sight singing of Western music.
In physics, sound is a vibration that typically propagates as an audible wave of pressure, through a transmission medium such as a gas, liquid or solid.
Sound energy is a form of energy associated with the vibration of matter.
A spectral line is a dark or bright line in an otherwise uniform and continuous spectrum, resulting from emission or absorption of light in a narrow frequency range, compared with the nearby frequencies.
Spectroscopy is the study of the interaction between matter and electromagnetic radiation.
In physics, a standing wave – also known as a stationary wave – is a wave which oscillates in time but whose peak amplitude profile does not move in space.
Stochastic resonance (SR) is a phenomenon where a signal that is normally too weak to be detected by a sensor, can be boosted by adding white noise to the signal, which contains a wide spectrum of frequencies.
String resonance occurs on string instruments.
A vibration in a string is a wave.
Surface plasmon resonance (SPR) is the resonant oscillation of conduction electrons at the interface between negative and positive permittivity material stimulated by incident light.
A swing is a hanging seat, often found at playgrounds for children, at a circus for acrobats, or on a porch for relaxing, although they may also be items of indoor furniture, such as Latin American hammock or the Indian oonjal.
Sympathetic strings or resonance strings are auxiliary strings found on many Indian musical instruments, as well as some Western Baroque instruments and a variety of folk instruments.
The 1940 Tacoma Narrows Bridge, the first Tacoma Narrows Bridge, was a suspension bridge in the U.S. state of Washington that spanned the Tacoma Narrows strait of Puget Sound between Tacoma and the Kitsap Peninsula.
The Taipei 101 / TAIPEI 101, formerly known as the Taipei World Financial Center – is a landmark supertall skyscraper in Xinyi District, Taipei, Taiwan.
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.
The Elegant Universe: Superstrings, Hidden Dimensions, and the Quest for the Ultimate Theory is a book by Brian Greene published in 1999, which introduces string and superstring theory, and provides a comprehensive though non-technical assessment of the theory and some of its shortcomings.
In oceanography, a tidal resonance occurs when the tide excites one of the resonant modes of the ocean.
In engineering, a transfer function (also known as system function or network function) of an electronic or control system component is a mathematical function giving the corresponding output value for each possible value of the input to the device.
A variety of types of electrical transformer are made for different purposes.
A transverse mode of electromagnetic radiation is a particular electromagnetic field pattern of radiation measured in a plane perpendicular (i.e., transverse) to the propagation direction of the beam.
A tuned mass damper, also known as a harmonic absorber or seismic damper, is a device mounted in structures to reduce the amplitude of mechanical vibrations.
A tuning fork is an acoustic resonator in the form of a two-pronged fork with the prongs (tines) formed from a U-shaped bar of elastic metal (usually steel).
"" or "" is a Latin hymn in honour of John the Baptist written in Horatian Sapphics and traditionally attributed to Paulus Diaconus, the eighth-century Lombard historian.
Vibration is a mechanical phenomenon whereby oscillations occur about an equilibrium point.
The violin, also known informally as a fiddle, is a wooden string instrument in the violin family.
The vocal tract is the cavity in human beings and in animals where the sound produced at the sound source (larynx in mammals; syrinx in birds) is filtered.
A watch is a timepiece intended to be carried or worn by a person.
In physics, a wave is a disturbance that transfers energy through matter or space, with little or no associated mass transport.
A wave function in quantum physics is a mathematical description of the quantum state of an isolated quantum system.
The Whispering Gallery of St Paul's Cathedral A whispering gallery is usually a circular, hemispherical, elliptical or ellipsoidal enclosure, often beneath a dome or a vault, in which whispers can be heard clearly in other parts of the gallery.
Wood is a porous and fibrous structural tissue found in the stems and roots of trees and other woody plants.
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