emissivity


emis·siv·i·ty

noun \ˌem-ə-ˈsiv-ət-ē, ˌē-ˌmis-ˈiv-\
plural emis·siv·i·ties

Definition of EMISSIVITY

: the relative power of a surface to emit heat by radiation : the ratio of the radiant energy emitted by a surface to that emitted by a blackbody at the same temperature

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