Application of Gegenbauer analysis to light scattering from spheres: Theory

Abstract
The Mie and Rayleigh-Debye theories of homogeneous spheres are reformulated in terms of Gegenbauer functions to allow a comparison between the two treatments in the Rayleigh-Debye limit. This leads to reduced Mie equations that are valid for all particle sizes, whereas the Rayleigh-Debye equations are restricted to an outer size parameter α