absorptance

Từ điển WordNet v3.1 - WordNet Dictionary

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
• Syn:
absorption coefficient, coefficient of absorption
• Hypernyms:
coefficient