Photon energy is the energy carried by a single photon. The amount of energy is directly proportional to the photon's electromagnetic frequency and thus, equivalently, is inversely proportional to the wavelength. The higher the photon's frequency, the higher its energy. Equivalently, the longer the photon's wavelength, the lower its energy.
Photon energy can be expressed using any energy unit. Among the units commonly used to denote photon energy are the electronvolt (eV) and the joule (as well as its multiples, such as the microjoule). As one joule equals 6.24×1018 eV, the larger units may be more useful in denoting the energy of photons with higher frequency and higher energy, such as gamma rays, as opposed to lower energy photons as in the optical and radio frequency regions of the electromagnetic spectrum.
Photonenergy is the energy carried by a single photon. The amount of energy is directly proportional to the photon's electromagnetic frequency and thus...
itself is made of discrete units of energy. In 1926, Gilbert N. Lewis popularized the term photon for these energy units. Subsequently, many other experiments...
physical constant of foundational importance in quantum mechanics: a photon'senergy is equal to its frequency multiplied by the Planck constant, and the...
wavelengths less than 10 picometers (1×10−11 m), gamma ray photons have the highest photonenergy of any form of electromagnetic radiation. Paul Villard,...
When a high frequency photon scatters due to an interaction with a charged particle, there is a decrease in the energy of the photon (and thus, an increase...
electromagnetic field consists of discrete energy parcels called photons. Photons are massless particles of definite energy, definite momentum, and definite spin...
and n2 = ∞ (principal quantum number of the energy level the electron descends from, when emitting a photon). The Rydberg formula was derived from empirical...
high photonenergy is able to ionize atoms, causing chemical reactions. Longer-wavelength radiation such as visible light is nonionizing; the photons do...
Photon counting is a technique in which individual photons are counted using a single-photon detector (SPD). A single-photon detector emits a pulse of...
specifically to a photon creating an electron–positron pair near a nucleus. As energy must be conserved, for pair production to occur, the incoming energy of the...
gravitational-wave energy. Because electromagnetic (EM) radiation can be conceptualized as a stream of photons, radiant energy can be viewed as photonenergy – the...
material absorbs the energy of a photon and acquires more energy than its binding energy, it is likely to be ejected. If the photonenergy is too low, the...
the energy distribution is established by the interaction of the photons with matter, usually the walls of the container, and the number of photons is...
equation in quantum mechanics which states that the energy E of a photon, known as photonenergy, is proportional to its frequency ν: E = h ν . {\displaystyle...
Photon polarization is the quantum mechanical description of the classical polarized sinusoidal plane electromagnetic wave. An individual photon can be...
are also massless particles carrying energy – photonenergy. The amount of energy per single gluon, or "gluon energy", directly measured, though a distribution...
classical electromagnetism. It is the low-energy limit of Compton scattering: the particle's kinetic energy and photon frequency do not change as a result of...
photon upconversion occurs through energy transfer upconversion (ETU), excited-state absorption (ESA) and photon avalanche (PA). Such processes can be...
within the photon. These characteristics are borne out by the experimental analyses of the photon structure function. Photons with high photonenergy can transform...
source of gravitation is the stress–energy tensor, a second-order tensor (compared with electromagnetism's spin-1 photon, the source of which is the four-current...
device's efficiency at each photonenergy level. For typical semiconductor photodetectors, QE drops to zero for photons whose energy is below the band gap....
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