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Noun: absorptance  ub'sorp-tun(t)s or ub'zorp-tun(t)s
  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";
    - absorption coefficient, coefficient of absorption

Derived forms: absorptances

Type of: coefficient

Encyclopedia: Absorptance