Find the ratio of the powers of a glass lens in water and in air .Given,refractive index of glass =1.50,refractive index of water=1.33.

A lens has a power of +5 D in air.If completely immersed in water,what will be its power ?Given,refractive index of glass = 3//2 ,refractive index of water = 4//3 .

Refractive index of glass is 1.5 find critical angle for glass.

What is the Brewster angle for air to glass transition? (Refractive index of glass = 1.5.)

A convex lens is made of glass of refractive index 1.5. If radius of curvature of the each of its two surfaces is 20 cm, find the ratio of power , of lens when placed in air to its power, when immersed inside a liquid of refractive index 1.25 .

A convex lens is made of glass of refractive index 1.5.If radius of curvature of the each of its twosurfaces is 20 cm,find the ratio of the power of the lens,when placed in air to its power ,when immersed inside a liquid of refractive index 1.25.

The apparent depth of water in cylindrical water tank of diameter 2 R cm is reducing at the rate of x cm //min when water is being drained out at a constant rate .The amount of water drained in c.c. per minute is (mu_(1) = refractive index of air, mu_(2) = refractive index of water)

A convex lens has 12 cm focal length in air. What is its focal length in water? (Refractive index of air-water is (1.33) , refractive index for air-glass = (1.5) .

A convex lens has 20 cm focal length in air.What is its focal length in water? (Refractive index of air-water is 1.33 , refractive index for air¬glass = 1.5).