Physics · Ray Optics
The angle of a prism is A and one of its refracting surfaces is silvered. Light rays falling at an angle of incidence '2A' on the first surface return back through the same path after suffering reflection at the silvered surface. The refractive index of the material of the prism is:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 12 sin A
- 22 cos A✓
- 32 tan A
- 42 sin(A/2)
Correct answer
2 cos A
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