Focal length of a convex lense in air is `10cm`. Find its focal
length in water. Given that `mu_g=3//2` and `mu_w=4//3`.

The focal length of a bi-convex glass (mu_g = 1.5) in air is 20 cm. Find its focal lengths in water (mu_w = 1.35) and in carbon di-suphide (mu_(cs) = 1.65).

Focal length of a convex lense in air is 20cm. and of concave lens 40cm. Find the position of final image.

Focal length of a convex lense in air is 20cm. and of concave lens 40cm. Find the position of final image.

The focal length of a convex lens of glass (mu = 1.5) in air is 30 cm. Find its focal length when the lens is placed in water (mu = 4//3) .

" I length of convex lens in air is "10cm" .Its focal length in water is (refractive index of glass "=3/2" ,refractive index of water "

The foal length of a glass convex lens in air is 15 cm.Calculate its focal lenth,when is is totally immersed in wate.Given a^mu_w=4//3 and a^mu_g=1.5 .

The focal length of a concave-convex lens of radii of curvature 5 cm and 10 cm is 20 cm. what will be its focal length in water ? Given .^(a)mu_(w) = 4//3 .

Focal length of a double convex lens is 20 cm in air. If this lens is dipped in water of refractive index 4//3 then what will be the new focal length ? (Take mu_(glass) = 1.5 )

A convex glass lens (mu_(g) = 1.5) has a focal length of 8 cm when placed in air. What is the focal length of the lens when it is immersed in water ? (mu_(omega) = (4)/(3))