Light Absorption and Reflection by Opaque Objects
The reflection coefficients calculated from Fresnel's laws apply to transparent materials. For opaque materials, the absorption coefficient for visible light can vary greatly. A high absorption coefficient for all visible wavelengths gives a surface a black appearance. A black surface will absorb energy more rapidly than a white object. An example occurs in the demonstration device sometimes called a "radiometer", though it is not immediately evident how it responds to wavelengths other than the visible range.
Blackbody radiation concepts
Heat transfer concepts