Scattering Properties of Concentric Soot–Water Spheres for Visible and Infrared Light

Based on the theory by Aden and Kerker, computations of the scattering and absorption properties for concentric spherical water and soot particles have been performed for visible and infrared wavelengths. The complex dielectric constant for the kernel was assumed to be frequency independent; for the water shell it was assumed to be constant over the visible range only. Computations were performed for size parameter values up to 250. Results indicate that, for compound particles with a nucleus smaller than about one-tenth of the total diameter of the particle, the optical properties are almost completely determined by the outer shell.