spectral linear attenuation coefficient (at a point in an absorbing and scattering medium, for a collimated beam of radiation) [µ(λ)]

quotient of the relative decrease caused by both absorption and scattering of the spectral concentration of the radiant flux, Φe,λ, of a collimated beam during its propagation along an elementary length, dl, at the point considered, by the length, dl


Unit: m-1

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