Abstract

A theory is presented with which the absorption of radiation in a diffusely light-scattering plane layer of infinite extent can be predicted when the Bouguer-law absorption and particle size of the material in the layer are known. The absorption of the scattering layer depends on the mass of absorbing material in a thin “monolayer” that is characteristic of the particular scattering layer. This monolayer thickness is closely related to the size of the particles in the layer. The absorption coefficient of the scattering layer is shown to be a large multiple of the Bouguer-law absorption coefficient when the absorption and particle size are small, and is a small multiple in the opposite case. An experimental test is in good agreement with the predictions of the theory.

© 1966 Optical Society of America

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