The fraction of the energy of electromagnetic radiation reflected from a body (or surface) relative to the energy incident upon it. The reflection of light from a surface is, of course, dependent on the @W06659@ of the light, the nature of the surface and its @A00346@ of incidence with the surface. The term albedo usually connotes a broad @W06659@ band (visible, ultraviolet or @IT07399@), whereas the terms reflectivity and spectral albedo are used to describe the reflection of monochromatic (single @W06659@ or small band of wavelengths) radiation.