A convex lens is dipped in a liquid whose refractive index is equal to the refractive index of the l

Question

A convex lens is dipped in a liquid whose refractive index is equal to the refractive index of the lens. Then its focal length will\

Professor PC Thomas Classes · Answer

(b) : When refractive index of lens is equal to the refractive index of liquid, the lens behave like a plane surface with focal length infinity.\