Near- and far-field light scattering by nonspherical particles: Applicability of methods that involve a spherical basis
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The separation of variables method for coordinate system, the extended boundary condition method, and the point-matching method that are used to solve the problem of light scattering by nonspherical particles are considered from a unified viewpoint. It is shown that, if the mathematical correctness condition (the Rayleigh hypothesis) holds, these methods are interrelated and are equivalent. The applicability ranges of the methods in the near- and far-field zones are analyzed, discussed, and compared on both analytical (based on analytical investigations) and practical (based on numerical calculations) grounds.
KeywordsScattered Radiation Scattered Field Axisymmetric Problem Nonspherical Particle Field Zone
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