See Reflection specular

Reflection from a smooth surface, such as a mirror, which maintains the integrity of the incident wavefront.

The redirection of incident light without diffusion at an angle that is equal to and in the same plane as the angle of incidence.

Regular reflection, without diffusion (see diffuse), in accordance with the laws of geometrical optics, as with a mirror or a highly polished metallic surface.

Direct reflection, i.e., the glinting reflections from white and shiny objects which cause bleaching of the highlights in a photograph. The problem of specular highlights can be reduced by using a diffuse light source, i.e., a light source of large area, rather than a point source.

  Mirror-like reflection of light rays from a surface. A ray of light is reflected as a ray in the direction that makes the angle of reflection equal to the angle of incidence. A specular reflection c [..]

An optical instrument reflector of polished metal or of glass with a film of metal.

Light incident on a surface that is redirected at the specular angle. Glossy or shiny surfaces exhibit a high degree of specular reflection.