Second-Order Light Scattering by Classical Fluids II: Double Light Scattering by Critical Fluids
In this lecture I shall treat the double (and higher-order multiple) scattering of light by critical fluids. We shall discuss the basic physics behind this “new” effect and how much (how little?) it tells us about the correlations of density fluctuations in these many-body systems. The first predictions of the dependence of double light scattering intensities on the temperature, incident wavelength and sample size were given by Oxtoby and Gelbart.1,2 These predictions were confirmed by the experiments of Reith and Swinney.3 A more general and rigorous theory was then developed by Boots, Bedeaux and Mazur,4–6 and several other experiments were performed.7–9
KeywordsMultiple Scattering Density Fluctuation Single Scattering Depolarization Ratio Critical Fluid
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