吸収率

(1)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"

(2)所定の物質を通過する電磁放射（光として）の強度比率の減少の測定

(3)単位質量、吸収装置の厚さにつき吸収される入射放射エネルギーの比率

(1)