Reflectance. Reflectivity
The ratio of the radiant flux reflected by the surface of a body (medium) to the radiant flux incident on this surface.
Comment. We distinguish between "spectral" and "integral" (or total) reflectance.
The ratio of the radiant flux reflected by the surface of a body (medium) to the radiant flux incident on this surface.
Comment. We distinguish between "spectral" and "integral" (or total) reflectance.