Encyclopedia > Conservation of radiance

Article Content

Conservation of radiance

In telecommunication, a conservation of radiance is a basic principle of optics, that no passive optical system can increase the quantity L /n ², where L is the radiance[?] of a beam and n is the local refractive index.

Note: "Conservation of radiance" was formerly called "conservation of brightness" or the "brightness theorem."

Source: from Federal Standard 1037C and from MIL-STD-188

All Wikipedia text is available under the terms of the GNU Free Documentation License

Search Encyclopedia

Search over one million articles, find something about almost anything!

Featured Article

Sakhalin

... pipeline directly to Japan, at Japan's expense). In 2003, the island was the second largest recipient of foreign investment[?] in Russia after Moscow. Unemployment in 2002 ...