Abstract

Experimental study of the scattering of coherent and incoherent light by latex hydrosols has been extended to determine the effects of larger diameter scatterers and of several scatterer concentrations. The angular dependence of the intensity of the light scattered by latex spheres suspended in water was measured. Two light sources were used: (1) a continuous wave He–Ne laser radiating at 6328 Å and (2) a high pressure, xenon arc lamp limited to a 100-Å bandwidth centered at 6328 Å. The number of particles in the scattering volume coherently illuminated with the laser was greater than the number coherently illuminated with the xenon lamp by a factor > 5 × 105. Six hydrosols were studied: three suspensions of particles polydispersed in size (diameter ranges from 6 μ to 14 μ, 12 μ to 35 μ, and 25 μ to 55 μ) and three suspensions of particles monodispersed in size (0.796-μ diam and concentration ranging from 5.7 × 107 particles/cm3 to 5.7 × 105 particles/cm3). For these six suspensions, the data from the two light sources agree to within the possible experimental error of 20%.

© 1968 Optical Society of America

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