Abstract: | For a medium that scatters isotropically, the exact reflectance, for a variety of distributions of incident light, is compared with the Kubelka-Munk reflectance. It is shown that, although the Kubelka-Munk reflectance is not identical to the exact reflectance forany incident light, it does have a good correlation with the reflectance produced by a single beam incident at 63d? to the surface normal. |