Absorptance

1 definition found

From WordNet (r) 2.0 [wn]:

  absorptance
       n : 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}]