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Convex lens is made of glass of refracti...

Convex lens is made of glass of refractive index `1.5` If the radius of curvature of each of the two surfaces is `20 cm` find the ratio of the powers of the lens, when placed in air to its power, when immersed in a liquid of refractive index `1.25`.

A

`2:5`

B

`5:2`

C

`3:2`

D

`2:3`

Text Solution

Verified by Experts

The correct Answer is:
B
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