This module computes the absorption, scattering, extinction, and backscatter efficiencies of a dielectric sphere according to both the Mie solution and the Rayleigh approximation. The user inputs the dielectric constant of the spherical particle, ϵ_p, the dielectric constant of the background medium, ϵ_b, and the sphere radius. The background dielectric is constrained to be less than the particle dielectric.
  ϵ_p= ϵ_p' -j ϵ_p''
  ϵ_b= ϵ_b' -j ϵ_b''