Question

A lens behaves as a converging lens in air and diverging lens in water. The refractive index of the material of the lens is

• A. 1
• B. Between 1 and 1.33
• C. 1.33
• D. Greater than 1.33

Answer 1

Answer: (B)

Between 1 and 1.33

$Answer:-$ B option

Since it is behaving as converging in air so its $\mu >1$,because $\mu =1$ is of air.

and also it is behaving diverging in water so its $\mu <1.33$ ,because $\mu =1.33$ is of water.