emissivity

(redirected from Graybody)
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Related to Graybody: Grey body

e·mis·siv·i·ty

(ē'mi-siv'i-tē),
The giving off of heat rays; a perfect "black body" has an emissivity of 1, a highly polished metallic surface may have an emissivity as low as 0.02.

emissivity

(ĕm″ĭ-sĭv′ĭ-tē)
The ability of a substance or surface to emit radiant energy.
References in periodicals archive ?
Neverbend's allies are either young and thoughtless, like most of his legislature, young and avaricious like Grundle, who wants Crasweller dead so he can marry his daughter and fortune, or old and essentially dead like Graybody, the curator of the College of Deposition.
This approach for obtaining a temperature is straightforward, if the measured surface behaves as a perfect emitter, or if the spectral emissivity is known in the case of graybody radiation.