Dependence of properties of the field on optical properties of the medium

We have noted earlier that the diminution of light intensity with depth is due to a combination of absorption and scattering processes, and also that the angular distribution of light intensity is determined by interaction between absorption and scattering. We shall now examine the quantitative relations that exist between the inherent absorption and scattering properties of the medium, and the angular structure and vertical attenuation of irradiance in the light field that is established.

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