Unpolarised light is incident from air onto a plane glass surface exactly at Brewster's angle. Which

Question

Unpolarised light is incident from air onto a plane glass surface exactly at Brewster's angle. Which of the following statements correctly and completely describes the polarization of the reflected light?

Professor PC Thomas Classes · Answer

(c) : According to Brewster's law, when an unpolarised light beam is incident at the specific polarizing angle (Brewster's angle), the reflected light is completely plane-polarised. Furthermore, the electric field vectors of this reflected polarized light vibrate exclusively in a direction that is perfectly perpendicular to the plane of incidence (the geometric plane containing the incident ray and the surface normal).