Refraction And Reflection

When unpolarized light is incident on a surface at Brewster's angle ( ), the reflected light is completely polarized perpendicular to the plane of incidence. Brewster's angle is given by the relation: where is the refractive index of the medium. Given , we have: The angle of incidence at Brewster's angle is . According to the law of reflection, the angle of reflection is equal to the angle of incidence: At Brewster's angle, the reflected light is completely polarized. The transmitted light is partially polarized. The angle of refraction can be found using Snell's Law: Here, (air) and : So, at Brewster's angle of , the reflected light is completely polarized, and the angle of reflection is , while the angle of refraction is .