Fig. 41. Absorption Pathlengths for Water Ice and Sulphuric Acid in the 3\dmic\ Region.

Pathlength for unit optical depth (reciprocal of the absorption coefficient) for water (at 266 oK, Warren, 1984) and sulfuric acid (at 100 oK, Sill, unpublished) ices. The potential effectiveness of sulfuric acid for depressing the 3.5\dmic\ reflectance of a surface can be seen.
Click here for hi-res. figure suitable for printing.