emissivity

Noun

Meaning

Tendency to emission; comparative facility of emission, or rate at which emission takes place, as of heat from the surface of a heated body.

Source: Webster's dictionary

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Examples

However, by definition, the radiation from a gray body is simply proportional to that of a black body at the same temperature, so its emissivity does not depend upon frequency (or, equivalently, wavelength). Source: Internet

A source with lower emissivity independent of frequency often is referred to as a gray body. Source: Internet

But added parameters are needed to determine local emissivity and albedo and address the factors that move energy about the earth. Source: Internet

During the night, the atmosphere cools somewhat, but not greatly, because its emissivity is low. Source: Internet

For example, it easily determines the effect on average earth temperature of changes in solar constant or change of albedo or effective earth emissivity. Source: Internet

For that reason, incorrect selection of emissivity will give inaccurate results when using infrared cameras and pyrometers. Source: Internet

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