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The English version of our glossary is currently under construction and will be regularly updated.


Albedo is used to measure a given body’s reflectivity. The lighter it is, the higher its albedo.

Albedo is used to measure the reflectivity of diffusely reflecting (but not mirrored) surfaces, expressed as the ratio of reflected to incoming shortwave radiation. A surface with an albedo of e.g. 0.3 reflects 30% of the incoming radiation and absorbs 70%. The lighter a surface is, the higher its albedo. Examples are provided in the following table.

Sample albedos for various surfaces.