The scattering is inferred from transmission measurements carried out on transparent particles of zinc oxide and other finely divided crystals. Rayleigh’s law of scattering is obeyed for the smallest particles of 0.088μ diameter but not for larger particles. Conclusions as to particle size and size distribution are drawn from the transmission curves. The effect of varying the refractive index of the medium surrounding the particles on the transmission curves is found to be in accord, qualitatively, with Rayleigh’s formula.
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A. H. Pfund (1934) studied this question.