emitted photon

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• 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 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 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 — /foh ton/, n. a quantum of electromagnetic radiation, usually considered as an elementary particle that is its own antiparticle and that has zero rest mass and charge and a spin of one. Symbolically represented by the small greek letter Gamma.… …   Universalium

• Time resolved photon emission prober — The Time Resolved Photon Emission Prober (TRPE) is an instrument which is used to measure timing waveforms on semiconductor devices. TRPE measurements are performed on the back side of the semiconductor device. The substrate of the device under… …   Wikipedia

• Lyc photon — or Ly continuum photon or Lyman continuum photon are a kind of photon emitted from stars. Hydrogen is ionized by absorption of Lyc photons. Lyc photons are in the ultraviolet portion of the electromagnetic spectrum of the hydrogen atom and… …   Wikipedia

• single photon emission computed tomography — n a medical imaging technique that is used esp. for mapping brain function and that is similar to positron emission tomography in using the photons emitted by the agency of a radioactive tracer to create an image but that differs in being able to …   Medical dictionary

• Single photon emission computed tomography — (SPECT, or less commonly, SPET) is a nuclear medicine tomographic imaging technique using gamma rays. It is very similar to conventional nuclear medicine planar imaging using a gamma camera. However, it is able to provide true 3D information.… …   Wikipedia

• dual photon absorptiometry — n absorptiometry that functions and is used similarly to dual energy X ray absorptiometry but that utilizes X rays generated by a radioscope * * * measurement of the bone mineral content in the axial skeleton, particularly the lumbar spine, by… …   Medical dictionary

• single photon emission computed tomography — noun : a medical imaging technique that is used especially for mapping brain function and that is similar to positron emission tomography in using the photons emitted by the agency of a radioactive tracer to create an image but that differs in… …   Useful english dictionary