Monodisperse precipitates of silver bromide were made which had average grain sizes in the range of 0.1 to 1.0 μ. The optical transmittance of dilute turbid suspensions of the grains was measured over the wavelength range from 300 to 700 mμ. Suspensions in water and in gelatin coatings were measured and the results compared with the single, independent scattering theories of Rayleigh and of Mie. Satisfactory-agreement between theory and experiment was found in most cases, but some effects of multiple scattering were found in coatings where the centers of grains were separated by less than two grain diameters.
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