reflectance

[ ri-flek-tuh ns ]
/ rɪˈflɛk təns /

noun Physics, Optics.

the ratio of the intensity of reflected radiation to that of the radiation incident on a surface.
Compare albedo.

Origin of reflectance

First recorded in 1925–30; reflect + -ance

British Dictionary definitions for reflectance

reflectance

reflection factor

/ (rɪˈflɛktəns) /

noun

a measure of the ability of a surface to reflect light or other electromagnetic radiation, equal to the ratio of the reflected flux to the incident flux Symbol: ρ Compare transmittance, absorptance