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(reciprocal of the absorption coefficient) for water (at 266 ^oK, Warren, 1984) and sulfuric acid (at 100^oK, Sill, unpublished) ices.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.
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