A material which scatters light as it reflects it.

a rough reflecting surface, such as this sheet of paper, that reflects light randomly in all directions and does not maintain internal order in a light beam

Occurs when light is reflected equally in all directions, but with diffuse energy.

Any surface that reflects incident rays in many directions, either because of irregularities in the surface or because the material is optically non-homogeneous. Contrasts with specular reflector.

Any surface with irregularities so large compared to the wavelength of the incident radiation that the reflected rays are sent back in multiple directions; the opposite of a specular reflector, such as a mirror. Most natural surfaces act more like diffuse reflectors than specular reflectors. Exceptions are calm water and some ice surfaces. To be distinguished from a perfectly diffuse reflector.