Question

A concave lens of refractive index 1.5 is immersed in a medium of the refractive index 1.65 .What is the nature of lens ?

Answer 1

when refractive index in the medium i.e 1.65 is greater. The refractive index of the lens i.e 1.5 the nature of the lens will change, so the concave lens will change into covex lens

Answer 2

Hey !!

The lens behaves a convex.

When the refractive index of a surrounding medium is more than refractive index of material of concave lens than the nature of the lens charges.

GOOD LUCK !!