Question

A lens behaves as a converging lens in air and a diverging lens in water (u = 4/3). What
will be the condition on the value of refractive index (u) of the material of the lens?
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Answer 1

Answer:

A lens behaves as a converging lens in air and a diverging lens in water (u = 4/3). It means refractive index of the material of lens is less than the refractive index of water. The condition is that the refractive index of a material of a lens is less than the refractive index of water.

Explanation:

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