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We present a rigorous treatment of the diffusion approximation for multiple light scattering in anisotropic random media, and apply it to director fluctuations in a nematic liquid crystal. For a typical nematic material, 5CB, we give numerical values of the diffusion constants D_ and D_⊥. We also calculate the temporal autocorrelation function measured in diffusing wave spectroscopy.
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Stark et al. (1996) studied this question.
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