Light scattering by a multilayered spheroidal particle
  The light scattering problem for a confocal multilayered spheroid has been
solved by the extended boundary condition method (EBCM) with a corresponding
spheroidal basis. The solution preserves the advantages of the approach applied
previously to homogeneous and core-mantle spheroids, i.e. the separation of the
radiation fields into two parts and a special choice of scalar potentials for
each of the parts. The method is known to be useful in a wide range of the
particle parameters. It is particularly efficient for strongly prolate and
oblate spheroids. Numerical tests are described. Illustrative calculations have
shown that the extinction factors to converge to average values with a growing
number of layers and how the extinction vary with a growth of particle
porosity.
