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 is

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 is
Answer» Given`i=2A` For figurer=`A` `:. mu=(sin i)/(sin r)=(sin 2A)/(sin A)` `=(2 sinAcosA)/(sinA)=2cosA`

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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 is

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