Dictionary Check: absorptance
"absorptance" is a valid word!
Scrabble
17
points
Words with Friends
21
points
Definition
noun
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
Example:
"absorptance equals 1 minus transmittance"
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