Question

If the refractive index from air to glass is 3/2 and that from air to water is 4/3, find the
ratio of focal lengths of a glass lens in water and in air.​

Answer 1

Answer:

If the refractive index from air to glass is 3/2 and that from air to water is 4/3, find the ratio of focal length of a glass lens in water and in air.