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photon

 [fo´ton]
a discrete particle (quantum) of radiant energy.

pho·ton (hν, γ),

(fō'ton),
In physics, a corpuscle of energy or particle of light; a quantum of light or other electromagnetic radiation.

photon

/pho·ton/ (fo´ton) a particle (quantum) of radiant energy.

photon

(fō′tŏn′)
n.
The elementary particle of light and other electromagnetic radiation; the quantum of electromagnetic energy. The photon is the massless, neutral vector boson that mediates electromagnetic interactions.

pho·ton′ic adj.

photon

[fō′ton]
Etymology: Gk, phos, light
the smallest quantity of electromagnetic energy. It has no mass and no charge but travels at the speed of light. Photons may occur in the form of x-rays, gamma rays, or quanta of light. The energy (E) of a photon is expressed as the product of its frequency (v) and Planck's constant (h), as in the equation E = hv. X-ray photons occur in frequencies of 1018 to 1021 Hz and energies that range upward from 1 KeV.

pho·ton

(γ) (fō'ton)
physics A corpuscle of energy or particle of light; a quantum of light or other electromagnetic radiation.

photon

a quantum of radiant energy with a wavelength in the visible range of the ELECTROMAGNETIC SPECTRUM.

Photon

A light particle.

photon 

The basic unit of radiant energy defined by the equation
E = hν
where h is Planck's constant (6.62 ✕ 10−34 joule ✕ second), ν the frequency of the light and E the energy difference carried away by the emission of a single photon of light. The term photon usually refers to visible light whereas the term quantum refers to other electromagnetic radiations. See quantum theory; wave theory; troland.

pho·ton

(γ) (fō'ton)
In physics, corpuscle of energy or particle of light; a quantum of light or other electromagnetic radiation.

photon (fō´ton),

n a bullet or quantum of electromagnetic radiant energy emitted and propagated from various types of radiation sources. The term should not be used alone but should be qualified by terms that will clarify the type of energy (e.g., light photon, radiographic photon).

photon

a particle (quantum) of radiant energy.

x-ray photon
a particle of x-ray energy.
References in periodicals archive ?
Nasdaq: SNPS) today announced the latest releases of the RSoft(TM) product portfolio, the company's industry-leading family of software tools for photonic component and optical communication system design.
The chains, described in the January Nature Photonics, delay more data than other chip-scale light-slowing technologies do, Vlasov says.
Backed by its extensive experience and leadership in DWDM technology, Nortel Networks developed the Common Photonic Layer to deliver significant simplification of DWDM optical line systems by eliminating the need for expensive circuitry found in today's line systems.
Finally, to populate the photonic PDK compact model library or to create a simulation model for a custom device, the integration can also support model parameter extraction of passive and active components from the Virtuoso physical layout using these Lumerical component-level solvers: FDTD Solutions, MODE Solutions and DEVICE.
Using a photonic crystal--in this case, a sliver of silicon punctuated by tiny holes--they have slowed light down to as little as 1,000 kps.
Fabrication of periodic photonic microstructures by the interference of ultrashort pulse laser beams.
LONDON -- The market for photonic crystals is increasing rapidly, with analysts indicating that it will grow by 46.
To be fair, the extent of risk involved in such migration without the technology having being developed to a foolproof state is cripplingly high, but photonic crystal stakeholders have no reason to lose heart, as there are multiple avenues for monetizing them through an array of components and modules.
However, photonic circuits that go completely silicon--including a silicon laser--aren't likely any time soon, he notes.
Deals not only with the bandgap properties of photonic crystals but also their unique dispersion properties and their potential applications
BACK TO THE SOURCE A photonic crystal allows radiation of certain wavelengths to enter its structure but blocks others.