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A convex lens of glass (mu(g)=1.45) has ...

A convex lens of glass `(mu_(g)=1.45)` has focal length `f_(g)` is air. The lens is immersed in a liquid of refractive index `(mu_(g))` 1.3. The ratio of the `f_(liquid)//f_(g)` is

A

`3.9`

B

`0.23`

C

`0.43`

D

`0.39`

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The correct Answer is:
A
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