An Etymological Dictionary of Astronomy and Astrophysics

An optical arrangement in which light from a source is allowed to fall on a plane mirror at → grazing incidence. The light directly coming from the source interferes with the light reflected from the mirror forming an → interference pattern. See also → Fresnel’s biprism, → Fresnel’s mirrors.

See also: After the Irish physicist Humphry Lloyd (1800-1881); → mirror.