ಅರ್ಥ : 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.
ಉದಾಹರಣೆ :
Absorptance equals 1 minus transmittance.
ಸಮಾನಾರ್ಥಕ : absorption coefficient, coefficient of absorption