Fig. C.1

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Plots of the efficiency of absorption Qabs(λ) for two exemplary grain shapes with a fractal dimension of Df = 2.0, different wavelengths λ (rows), and grain sizes aeff (columns). Solutions are calculated with the DDSCAT code for different values of the number of dipoles Ndip (red dot). The DDSCAT solutions are extrapolated assuming Ndip → ∞ (blue dots). The percentage values represent the error between the extrapolated solutions and the exact solutions of the MSTM code (black cross).
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