Gray Body

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Gray Body

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A hypothetical body which absorbs some constant fraction, between zero and one, of all electromagnetic radiation incident upon it, which fraction is the absorptivity and is independent of wavelength. As such, a gray body represent a surface of absorptive characteristics intermediate between those of white body and a black body. No such substance are known in nature. Also called grey body. [[/a>|/a> ]]

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use