Dynamic equations have been derived which describe ray diffusion in the weak-fluctuation approximation for any anisotropic medium. A technique for going from ray equations in an anisotropic medium with random inhomogeneities of the refraction index to Einstein-Fokker equations has been suggested. As an example, the problem of light scattering in a uniaxial crystal is solved. The formula derived for the transition probability of the beam state indicates anisotropic scattering even for an isotropic correlation function of scattering inhomogeneities.
Department of Physics of Atmosphere, Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia
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