Refractiven index of glass is `3/2` and that of water is `4/3` w.r.t. air. Calculate the ratio of focal length of a lens made of the glass when placed in water and air.

Find focal lengths of lenses made of glass (mu=3//2) and placed in air.

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.

The refractive index of glass is 3//2 and refractive index of water is 4//3 . What would be the refractive index of water with respect to glass ? Does light travel faster in glass than in water?

4 A thin liquid convex lens is formed in glass. Refractive index of liquid 4/3 is and that of glass is 3/2 If 'f' is the focal length of the liquid lens in air its focal length and nature in the glass is

The refractive index of glass with respect to air is 3/2 and the refraction index of water with respect to air is 4/3 . The refractive index of glass with respect to water will be:

A convex lens of refractive index 1.5 has a focal length of 20 cm in air. Calculate the change in its focal length when it is immersed in water of refractive index 4/3.

A convex lens of refractive index 1.5 has a focal length of 18 cm in air. Calculate the change in its focal length when it is immersed in water of refractive index (4)/(3) .