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Focal length of a lens in air is f. Refr...

Focal length of a lens in air is f. Refractive index of the lens is `mu`. Focal length changes to `f_(1)` if lens is immersed in a liquid of refractive index `(mu)/(2)` and it becomes `f_(2)` if the lens is immersed in a liquid of refractive index `2 mu`. Then

A

`f_(1) = (f)/(2)`

B

`f_(2) = -2f`

C

`f_(2) = -(3f)/(2)`

D

Data is insufficient

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The correct Answer is:
D
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