ab·sorp·tance ( b-sôrp tns, -zôrp-)n. The ratio of absorbed to incident radiation. [absorpt(ion) + -ance.] |
absorptance [əbˈsɔːptəns -ˈzɔːp-], absorption factor
n
(Physics / General Physics) Physics 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 Symbol α Compare reflectance, transmittance
[absorption + -ance]
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. |  absorptance - a measure of the rate of decrease in the intensity of electromagnetic radiation (as light) as it passes through a given substance; the fraction of incident radiant energy absorbed per unit mass or thickness of an absorber; "absorptance equals 1 minus transmittance"coefficient - a constant number that serves as a measure of some property or characteristic |
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