Associations to the word «Absorptance»

ABSORPTANCE, noun. (optics) (physics) Absorbed radiation and incident radiation in a ratio format; a measurement that shows how well a surface absorbs radiation. [First attested in the mid 20th century.]

ABSORPTANCE, 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; "absorptance equals 1 minus transmittance".