A prism of angle A has one surface silvered. Light rays falling at an angle of incidence 2A on first surface and return through the same path after suffering refraction at the second silvered surface. Refractive index of prism material is:

A prism of angle A has one surface silvered. Light rays falling at an

1.	A prism of angle A has one surface silvered. Light rays falling at an angle of incidence 2A on first surface and return through the same path after suffering refraction at the second silvered surface. Refractive index of prism material is:
Answer» 2 sinA `1/2 COSA` TAN A 2 cos A Answer :D

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A prism of angle A has one surface silvered. Light rays falling at an angle of incidence 2A on first surface and return through the same path after suffering refraction at the second silvered surface. Refractive index of prism material is:

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