Figure 2.
Theoretical absorption curves of several types of dust grains. Notice that most of the interesting details lie in the range from 8 to 20 microns, the range covered by the Low Resolution Spectrometer on the IRAS spacecraft. Of special note here are the curves for astronomical silicates (Sil) and amorphous carbon (am.C). [I&E 95, I], data adapted from Draine and Lee (1984) and Simpson (1991).