Absorbance vs. Absorptance

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Main Difference

The main difference between Absorbance and Absorptance is that the Absorbance is a common logarithm of the ratio of incident to transmitted radiant power through a material; the optical depth divided by ln(10) and Absorptance is a ratio of absorbed to incident radiant flux

  • Absorbance (noun)

    A logarithmic measure of the amount of light that is absorbed when passing through a substance; the capacity of a substance to absorb light of a given wavelength; optical density. First attested in the mid 20th century.page=9

  • Absorptance (noun)

    Absorbed radiation and incident radiation in a ratio format; a measurement that shows how well a surface absorbs radiation. First attested in the mid 20th century.page=9

Princeton's WordNet

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