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Question

Question: Focal length of a lens in air is f. Refractive index of the lens is m. Focal length changes to f<sub...

Focal length of a lens in air is f. Refractive index of the lens is m. Focal length changes to f1 if lens is immersed in a liquid of refractive indexμ2\frac { \mu } { 2 } and it becomes f2 if the lens is immersed in a liquid of refractive index 2m. Then –

A

f1 =

B

f2 = – 2f

C

f2 = –

D

Data is insufficient

Answer

Data is insufficient

Explanation

Solution

Without knowing the value of µ, we can't find out f1 and f2.