A ray of light is incident at an angle of 60∘ on one face of a prism of angle 30∘. The emergent ray of light makes an angle of 30∘ with incident ray. The angle made by the emergent ray with second face of prism will be:
Held on 16 Apr 2018 · Verified 6 Jul 2026.
0∘
90∘
30∘
45∘
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