Question

A thin lens is made with a material having refractive index $\mu =1·5$. Both the side are convex. It is dipped in water ($\mu =1·33$). It will behave like
(a) a convergent lens
(b) a divergent lens
(c) a rectangular slab
(d) a prism.

Answer 1

(a) a convergent lens

Since the refractive index of lens is more than that of of water and both the sides are convex, it will act like a normal convergent lens (though its focal length will change).