Equivalence of light scattering by strong absorbing aerosol particles in internal mixing state

For a monodispersion of water coated carbon particles in internal mixing state, the validity of equivalent refractive index for describing the internal mixture of aerosol particles with different complex refractive indexes is analyzed by their scattering efficiency and phase function. The equivalence of extinction efficiency is good in Rayleigh scattering’s range and geometrical optics’ range at different volume ratios of the carbon particle to the mixture, but the equivalence is not good in the range of Mie scattering. When the volume ratio of the strong absorbing material, carbon particle, is greater than 0.3, the equivalences of absorption efficiency and extinction efficiency are good. However, the equivalence of phase function is poor at different mixture ratios besides the range of