PROPAGATION OF A STATIONARY LIGHT-FLUX IN A RANDOMLY INHOMOGENEOUS 3DMEDIUM WITH A 6-DIRECTIONAL SCATTERING PHASE FUNCTION

In this paper, we study the propagation of light fluxes in a semi infi nite randomly inhomogeneous absorbing medium with chaotically distribu ted scattering centers. The real law of single scattering is simulated with a six-directional model scattering phase function. The case of n ormal incidence of a broad stationary light flux on a flat surface of a medium is considered. With such a geometry of the problem, we can de rive the exact analytical solution to the transfer equation with the s ix-directional scattering phase function specified above. The problem of reflection of light is analyzed in detail. The total coefficient of reflection from such a model medium is calculated. The results of our analysis are compared with the exact reflection coefficient correspon ding to an isotropic law of single scattering described by the Chandra sekhar formula. It is shown that the mean value of the reflection coef ficient calculated with the use of six- and two-directional scattering phase functions coincides with predictions of the Chandrasekhar formu la within an accuracy of 5% in a broad range of the values of the abso rption coefficient of a medium.