Angle of prism is `A` and its one surface is silvered. Light rays falling at an angle of incidence `2 A` on first surface return back through the same path after suffering reflection at second silvered surface. Refraction index of the material of prism isA. `2 sin A`B. `2 cos A`C. `(1)/(2) cos A`D. `tan A`

Angle of prism is `A` and its one surface is silvered. Light rays fall

1.	Angle of prism is `A` and its one surface is silvered. Light rays falling at an angle of incidence `2 A` on first surface return back through the same path after suffering reflection at second silvered surface. Refraction index of the material of prism isA. `2 sin A`B. `2 cos A`C. `(1)/(2) cos A`D. `tan A`
Answer» Correct Answer - b

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