Fig. 3.
From: Shape effects in optical properties of composite dust particles
Extinction (top-left), absorption (top-right), backscattering (bottom-left) averaged efficiencies for 25 BCAB PB clusters, aeff = 200 nm (full lines, ‘DDAavg’), compared to the corresponding optical efficiencies of the coated sphere of same radius aeff, and composition (dashed lines, ‘Sph’). The respective ratios S (λ), as defined in (1), are on the bottom-right figure. The logarithmic scale for the optical parameter x = 2πaeff/λ, is used to magnify the large-λ range.