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 absorption coefficient absorption coefficient /əbˈzɔːrpʃən koʊˈɪfɪʃənt/

noun

  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 , absorption coefficient , coefficient of absorption )
    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
    absorptance equals 1 minus transmittance