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Determination of spherical biological particles parameters from light-scattering indicatrix visibility

The relations between intensities of light scattering in positions of indicatrix extrema (visibility) and relative refractive index of a homogeneous sphere are studied analytically and numerically for optically soft particles. The Wentzel- Kramers-Brillouin approximation has been used for solution of inverse problem. The obtained results reveal the opportunity of determination of relative refractive index for individual spherical particles from experimental indicatrix.