Treatment of the scattering of radiation by a spherical concentric core–shell system as a problem of multiple scattering by two spheres leads to a fuller understanding of the physical processes that produce the scattered fields of such a particle. The problem of scattering from a sphere containing multiple spherical inhomogeneities must, as a special case, be reducible to the problem considered here. Such a reduction leads to an expression of the scattering coefficients of coated spheres solely in terms of the scattering coefficients associated with a homogeneous host and with an isolated core, in agreement with the multiple scattering treatment.
© 1993 Optical Society of America
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