The angle at which an electromagnetic wave incident upon a material does not have part of itself reflected. It is dependent on the material type and the polarization of the incident wave: the Brewster angle has different values depending on whether the electric field is perpendicular or parallel to the plane of incidence. In the case of a nonmagnetic material, the Brewster angle does not exist for perpendicular polarization: if an unpolarized beam of light is incident upon a surface at the Brewster angle, the parallel polarization is then completely transmitted and only perpendicularly polarized light is reflected. The Brewster angle is then also called the polarizing angle.