Reflectance vs. Albedo — What's the Difference?

The reflectance 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 the boundary.

Albedo (; from Latin albedo 'whiteness') is the measure of the diffuse reflection of solar radiation out of the total solar radiation and measured on a scale from 0, corresponding to a black body that absorbs all incident radiation, to 1, corresponding to a body that reflects all incident radiation. Surface albedo is defined as the ratio of radiosity Je to the irradiance Ee (flux per unit area) received by a surface.

The ratio of the total amount of radiation, as of light, reflected by a surface to the total amount of radiation incident on the surface.

The fraction of incident electromagnetic radiation reflected by a surface, especially of a celestial body.

(physics) The ratio of the flux reflected to that incident on a surface.

The spongy white tissue on the inside of the rind of citrus fruit.

The fraction of radiant energy that is reflected from a surface

The fraction of incident light or radiation reflected by a surface or body, commonly expressed as a percentage.

(botany) The whitish inner portion of the rind of citrus fruits that is a source of pectin, commonly referred to as the pith.

(alchemy) One of the four major stages of the magnum opus, involving purification of the prima materia.

Whiteness.

The ratio of reflected to incident light