photon area

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• photon — ☆ photon [fō′tän΄ ] n. [ PHOT(O) + (ELECTR)ON] 1. Particle Physics a subatomic particle, having energy and momentum but no mass or electric charge, that is the quantum unit of electromagnetic radiation, including light: see also CLASSON 2. a unit …   English World dictionary

• Photon — This article is about the elementary particle of light. For other uses, see Photon (disambiguation). Photon Photons emitted in a coherent beam from a laser Composition Elementary particle …   Wikipedia

• Photon mapping — In computer graphics, photon mapping is a two pass global illumination algorithm developed by Henrik Wann Jensen that solves the rendering equation. Rays from the light source and rays from the camera are traced independently until some… …   Wikipedia

• Photon entanglement — This brief explanation of photon entanglement is a supplement to the article Bohr Einstein debates and is designed to help clarify the discussion of the Einstein Podolsky Rosen argument in quantum theory which takes place in that… …   Wikipedia

• Photon gas — In physics, a photon gas is a gas like collection of photons, which has many of the same properties of a conventional gas like hydrogen or neon including pressure, temperature, and entropy. The most common example of a photon gas in equilibrium… …   Wikipedia

• photon —    A subatomic particle having zero mass, no electric charge, and an indefinitely long lifetime. Photon is also the name of a unit of retinal illumination, equal to the amount of light that reaches the retina through one square millimeter of… …   Glossary of Art Terms

• photon — noun Etymology: phot + 2 on Date: 1916 1. a unit of intensity of light at the retina equal to the illumination received per square millimeter of a pupillary area from a surface having a brightness of one candle per square meter 2. a quantum of… …   New Collegiate Dictionary

• photon — In physics, a corpuscle of energy or particle of light; a quantum of light or other electromagnetic radiation. * * * pho·ton fō .tän n 1) a unit of intensity of light at the retina equal to the illumination received per …   Medical dictionary

• Radiative transfer equation and diffusion theory for photon transport in biological tissue — Photon transport in biological tissue can be equivalently modeled numerically with Monte Carlo simulations or analytically by the radiative transfer equation (RTE). However, the RTE is difficult to solve without introducing approximations. A… …   Wikipedia

• Monte Carlo method for photon transport — Modeling photon propagation with Monte Carlo methods is a flexible yet rigorous approach to simulate photon transport. In the method, local rules of photon transport are expressed as probability distributions which describe the step size of… …   Wikipedia

• Two-photon absorption — (TPA) is the simultaneous absorption of two photons of identical or different frequencies in order to excite a molecule from one state (usually the ground state) to a higher energy electronic state. The energy difference between the involved… …   Wikipedia