Quasi-Elastic Light Scattering by a Spherical Particle Immersed in a Viscoelastic Medium

Abstract

The Brownian motion of a small spherical particle in a general viscoelastic medium is discussed to derive the spectral distribution and the intensity correlation function of the scattered light. A new method is suggested to measure the complex viscosity coefficient of this medium from the light scattering measurements. Simple examples are discussed in detail.