When the angle of incidence from air on a material is 60°, the reflected light is completely polarized. The velocity of the refracted ray inside the material is:
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Question

When the angle of incidence from air on a material is 60°, the reflected light is completely polarized. The velocity of the refracted ray inside the material is:

G1 Physics · Accepted Answer

This is the same Brewster-angle condition: n=tan60°=√3, so v=c/n=√3×10⁸ m s⁻¹. Option C.