On the applicability of the Beer-Lambert-Bouguer law for estimating the absorption coefficient of light rays in a cloud of dispersed liquid
A.V. Zagnitko1, N.P. Zaretsky1, L.I. Menshikov1,2, P.L. Menshikov1,2
1National Research Center В«Kurchatov Institute», Moscow, Russia
2Moscow Institute of Physics and Technology (State University), Moscow, Russia
Keywords: light scattering, optical density, scattering phase function, aerosol, absorption coefficient, Bouguer-Lambert-Beer law, geometrical optics, mean free path, diffraction
Abstract
The conditions for applicability of the Bouguer-Lambert-Beer law for aerosol clouds with particles much larger than the photon wavelength are derived in the form of an analytical formula. The corrections to this law due to diffraction scattering and the geometry of a measuring device are estimated. The resulting formula is useful for processing single experiments that cannot be repeated for some reason.
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