A thin lens of refractive index `1.5` has focal length of `15 cm` in air. When the lens
Channel: Doubtnut
Date: 05/07/2020

A thin lens of refractive index `1.5` has focal length of `15 cm` in air. When the lens is placed is a medium of refractive index (4)/(3), its focal length will become …..cm.