An unpolarized ray is incident on a transparent sphere of refractive index μ=√3 with the geometry shown. Choose the correct statements about rays 1, 2, 3 and 4.

Question

G1 Physics · Accepted Answer

At the first surface, i=60° and μ=√3, so tan i=μ: the reflected ray is completely polarized. The transmitted ray is partially polarized. Inside the sphere the refracted angle is 30°, which is the Brewster angle for glass-to-air because tan30°=1/√3; hence the internally reflected ray is completely polarized while the transmitted ray remains partially polarized. Correct: A,B,C,D.