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We have measured the scattered intensity from the high- (+) and low- (-) density phases of a critical binary mixture and found that (I₊-I_-)~t^-θ where θ=1-β. Here β is the critical exponent for the coexistence curve and the reduced temperature t=(Tc-T)Tc with Tc the critical temperature. This result is in good agreement with the prediction of the revised scaling equation of state proposed by Rehr and Mermin.
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Wong et al. (1975) studied this question.
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