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absorptance
[ ab-sawrp-tuhns, -zawrp- ]
noun
, Physics, Optics.
- the ratio of the amount of radiation absorbed by a surface to the amount of radiation incident upon it.
absorptance
/ əbˈsɔːptəns; -ˈzɔːp- /
noun
- See transmittance, reflectancephysics a measure of the ability of an object to absorb radiation, equal to the ratio of the absorbed radiant flux to the incident flux. For a layer of material the ratio of the flux absorbed between the entry and exit surfaces of the layer to the flux leaving the entry surface is the internal absorptance α Compare reflectance transmittance
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Word History and Origins
Origin of absorptance1
1930–35; translation of German Absorptionsvermögen. See absorption, -ance
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Word History and Origins
Origin of absorptance1
C20: absorption + -ance
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