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Text (Text body) Radiance is a quantity in Physics (like voltage or length), specifying the amount of energy radiated in a given direction from a surface. Mostly used with non-ionizing, electromagnetic radiation in the visible spectrum (light), ultra-violet (UV) or infrared (IR). More precisely, it's defined as radiated power over solid angle and "projected" area, the SI unit being [Watt/(m2 sr)]. Other websites (not related to us) with info on Physics and Optics: hyperphysics.phy-astr.gsu.edu has a nice overview, and en.wikipedia.org/wiki/Radiance has the math.

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Radiance is a quantity in Physics (like voltage or length), specifying the amount of energy radiated in a given direction from a surface. Mostly used with non-ionizing, electromagnetic radiation in the visible spectrum (light), ultra-violet (UV) or infrared (IR). More precisely, it's defined as radiated power over solid angle and "projected" area, the SI unit being [Watt/(m2 sr)]. Other websites (not related to us) with info on Physics and Optics: hyperphysics.phy-astr.gsu.edu has a nice overview, and en.wikipedia.org/wiki/Radiance has the math.
By subscribing or downloading you accept these terms.

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Radiance is a quantity in Physics (like voltage or length), specifying the amount of energy radiated in a given direction from a surface. Mostly used with non-ionizing, electromagnetic radiation in the visible spectrum (light), ultra-violet (UV) or infrared (IR). More precisely, it's defined as radiated power over solid angle and "projected" area, the SI unit being [Watt/(m2 sr)]. Other websites (not related to us) with info on Physics and Optics: hyperphysics.phy-astr.gsu.edu has a nice overview, and en.wikipedia.org/wiki/Radiance has the math.

By subscribing or downloading you accept these terms:

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Updated 27-Jul-2020 13:43 PDT