The refractive index of the material of a prism is √2 and the angle of the prism is 30°.One of the two refracting surfaces of theprism is made a mirror inwards, by silvercoating. A beam of monochromatic lightentering the prism from the other face willretrace its path (after reflection from thesilvered surface) if its angle of incidence onthe prism is
(1) 30° (2) 45°
(3) 60° (4) Zero
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Answer:
OPTION 1
Explanation:
30°
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option (1) 30° is the ans
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