Everything about The Albedo totally explained
The
albedo of an object is the extent to which it diffusely reflects light from the sun. It is therefore a more specific form of the term
reflectivity. Albedo is defined as
the ratio of
diffusely reflected to incident
electromagnetic radiation. It is a
unitless measure indicative of a surface's or body's diffuse
reflectivity. The word is derived from
Latin albedo "whiteness", in turn from
albus "white". The range of possible values is from 0 (dark) to 1 (bright).
The albedo is an important concept in
climatology and
astronomy. In climatology it's sometimes expressed as a percentage. Its value depends on the
frequency of radiation considered: unqualified, it usually refers to some appropriate average across the spectrum of
visible light. In general, the albedo depends on the direction and directional distribution of incoming radiation. Exceptions are
Lambertian surfaces, which scatter radiation in all directions in a cosine function, so their albedo doesn't depend on the incoming distribution. In realistic cases, a
bidirectional reflectance distribution function (BRDF) is required to characterize the scattering properties of a surface accurately, although albedos are a very useful first approximation.
Terrestrial albedo
Further Information
Get more info on 'Albedo'.
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