absorptance

ab·sorp·tance  (b-sôrptns, -zôrp-)

n.

The ratio of absorbed to incident radiation.

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[absorpt(ion) + -ance.]

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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]

Thesaurus

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" absorption coefficient, coefficient of absorption coefficient - a constant number that serves as a measure of some property or characteristic