Abstract

In a dense distribution of particles, the propagation characteristics of the coherent field are strongly affected by the pair-correlated distributions of scatterers. This paper presents an optical experimental study to show that, when the particle density is greater than about 0.1%, the attenuation constant departs markedly from the formula based on an uncorrelated scatter assumption. It decreases sharply when <i>ka</i> <1, whereas it shows a slight increase when <i>ka</i> ≫ 1. Experimental data are shown for the volume densities ranging from 10<sup>-3</sup> to 40% and ha ranging from 0.529 to 82.793. Comparisons are given with some theoretical calculations.

© 1982 Optical Society of America

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