Physics · Ray Optics

A prism has a refracting angle A. The second refracting surface of the prism is silvered. A light ray falling on the first refracting surface with an angle of incidence 2A reaches the second surface and retraces its path after reflection at the silvered surface. The refractive index of the material of the prism is:

Verified Solution4 OptionsUpdated: October 2026👁️1 View

Correct answer

2 cos(A)

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