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An isosceles prism of angle A=30^(@) has...

An isosceles prism of angle `A=30^(@)` has one of its surfaces silvered. Light rays falling at an angle of incidence `60^(@)` on the other surface retrace their path after reflection from the silvered surface. The refractive index of prism material is

A

1.414

B

1.5

C

1.732

D

1.866

Text Solution

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The correct Answer is:
C
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