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The focal length of a thin lens in vacuu...

The focal length of a thin lens in vacuum is `f`. If the material of the lens has `mu = 3//2`, its focal length when immersed in water of refractive index `4//3` will be.

A

f

B

`4/3`f

C

2f

D

4f

Text Solution

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The correct Answer is:
D
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