The polarized (I_∥) and depolarized (I_⊥) scattered light intensity by fluctuations of the order parameter Q near the isotropic-nematic phase transition of para-methoxybenzylidene para-n-butylaniline has been measured as a function of the scattering angle over a range of temperatures above the phase-transition temperature Tₚ by means of two different incident wavelengths. Our results are in excellent agreement with the phenomenological theory of de Gennes. We also find the elastic constants L₁L₂ while L₁ depends upon temperature.
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Chu et al. (1972) studied this question.
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