MHT CET 2023 Physics question
When a monochromatic ray of light is passed through an equilateral glass prism, it is found that the refracted ray in glass is parallel to the base of the prism. If 'i' and 'e' denote the angles of incidence and emergence respectively, then
Answer: (C)
Solution
In an equilateral prism, a ray inside the glass that is parallel to the base makes equal angles with the two refracting faces, so the angle of refraction at the first face equals that at the second face: . By Snell's law, and , hence
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