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A double convex lens of focal length 30 ...

A double convex lens of focal length 30 cm is made of glass. When it is immersed in a liquid of refractive index 1.4, the focal length is found to be 126 cm. The critical angle between glass and the liquid is

A

`sin^(-1) (3/4)`

B

`sin^(-1)(4/5)`

C

`sin^(-1) (7/13)`

D

`sin^(-1) (7/8)`

Text Solution

Verified by Experts

The correct Answer is:
D
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