emissivity
[ em-uh-siv-i-tee, ee-muh- ]
/ ˌɛm əˈsɪv ɪ ti, ˈi mə- /
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noun Thermodynamics.
the ability of a surface to emit radiant energy compared to that of a black body at the same temperature and with the same area.
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Words nearby emissivity
emission, emission nebula, emission spectrum, emissions trading, emissive, emissivity, emit, emittance, emitter, EMLA, Emlyn
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
Example sentences from the Web for emissivity
Low-e, for “low emissivity,” refers to a microscopically thin coating of metallic particles that reflect some wavelengths of light while allowing most of the visible wavelengths to pass through.
Cloudy double-pane windows are to be expected with time|Jeanne Huber|January 11, 2021|Washington PostValues which are commonly given for the surface emissivity must therefore be accepted with great reserve.
The emissivity increases with the temperature, else no state of thermal equilibrium could be reached.
Although these mantles emitted a brilliant light for a few hours, their light-emissivity was destroyed by carbonization.
Artificial Light|M. Luckiesh
British Dictionary definitions for emissivity
emissivity
/ (ɪmɪˈsɪvɪtɪ, ˌɛm-) /
noun
a measure of the ability of a surface to radiate energy; the ratio of the radiant flux emitted per unit area to that emitted by a black body at the same temperatureSymbol: ε
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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