Brewster’s Law If the angle of incidence and the angle of refraction are complementary angles, the angle of incidence is referred to as the Brewster angle θB. The Brewster angle is related to the indices of refraction of the two media, n1 and n2, by the equation n1 sin θB = n2 cos θB, where n1 is the index of refraction of the incident medium and n2 is the index of refraction of the refractive medium. Determine the Brewster angle for a light beam traveling through water (at 20°C) that makes an angle of incidence with a smooth, flat slab of crown glass.

Brewster’s Law If the angle of incidence and the angle of refraction are complementary angles, the angle of incidence is referred to as the Brewster angle θB. The Brewster angle is related to the indices of refraction of the two media, n1 and n2, by the equation n1 sin θB = n2 cos θB, where n1 is the index of refraction of the incident medium and n2 is the index of refraction of the refractive medium. Determine the Brewster angle for a light beam traveling through water (at 20°C) that makes an angle of incidence with a smooth, flat slab of crown glass.