The Critical Phase Changes of a Forward-scattered Light in a Nonpolar Binary Liquid Mixture

Abstract

In a previous paper 1 the author and his coworkers have obtained analytic results for the phase changes of the forward-scattered light in a nonpolar chiral fluid, when the incident light is completely linearly polarized above (or below) the horizontal at 45 o , using the formalism given by Barron 2 and the theory for the dielectric tensor developed by Lee and Kim. 3 The method is so effective that it enables us to calculate phase changes of the forward-scattered light in the critical region with the aid of Ornstein-Zernike theory of the correlation function of density fluctuations. Then, the method was extended to a binary liquid mixture composed of a chiral solute and an achiral solvent. 4 The mixture is more suitable for experimental verification than the pure fluid. The basic difference with the latter is that there is one more extra variable in the mixture, i.e., the concentration fluctuations. The results for the azimuth and ellipticity changes were extended in the critical region that the Fisher theory holds. 5 The purpose of the present paper is to discuss the phase changes in the critical region of a nonpolar binary liquid mixture, using the Fisher form for the correlation function of concentration fluctuations. 6,7 The explicit results are given without the detailed procedures, which were derived in the previous papers. 1,4