of the surface of a material is its effectiveness in reflecting radiant energy
. It is the fraction of incident electromagnetic power that is reflected at an interface. The reflectance spectrum or spectral reflectance curve is the plot of the reflectance as a function of wavelength
The hemispherical reflectance of a surface, denoted R, is defined as
The spectral hemispherical reflectance in frequency and spectral hemispherical reflectance in wavelength of a surface, denoted Rν and Rλ respectively, are defined as
The directional reflectance of a surface, denoted RΩ, is defined as
This page was last edited on 12 April 2018, at 16:47 (UTC)
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