EMISSIVITY

Emissivity

The emissivity of a material is the relative ability of its surface to emit energy by radiation. It is the ratio of energy radiated by a particular material to energy radiated by a black body at the same temperature. A true black body would have an ε = 1 while any real object would have ε < 1. Emissivity is a dimensionless quantity.

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emissivity

Noun

  1. The energy-emitting propensity of a surface, usually measured at a specific wavelength.


The above text is a snippet from Wiktionary: emissivity
and as such is available under the Creative Commons Attribution/Share-Alike License.

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