A beam of light strikes a glass sphere of 20 cm diameter converging towards a point 40 cm behind the pole of the spherical surface.Fnd the position of the image,if the refractive index of glass is 1.5.

A small piece of paper stucjk on a glass shpere of 5 cm radius is viewed through the glass from the position directly opposite .Find the position of the image .Refractie index of glass is 1.5.

the radius of curvature of convex surface is 10 cm and if an object lies at a distance of 20 cm from it in the rarer medium,find the position of the image assuming that refractive index of the rarer medium is 1.0 ,while that of the denser medium is 2.0.

A concave spherical surface of refractive index 3//2 is immersed in water of refracitve index 4//3 .If a piont object lies in water at a distance of 10 cm from the pole of the refracting surfae,calculate the position of the image.Given that radius of curvature of the spherical surface is 18 cm.

A small black dot is marked on the surface of a glass spehre (mu=1.5) and is viewed from the other side.If radius of the sphere is 15 cm,find the position of the image of the dot.

What is the focal length of a double convex lens for which radius of curvature of the surfaces is 40 cm and refractive index of the glass is 1.5?

Fill ups The speed of light in glass having refractive index of 1.5=………………. ms^-1 .

A prism is made of glass of unknown refractive index. A parallel beam of light is incident on a face of the prism. The angle of minimum deviation is measured to be 40^@ . What is the refractive index of the material of the prism? The refracting angle of the prism is 60^@ . If the prism is placed in water (refractive index 1.33), predict the new angle of minimum deviation of a parallel beam of light.

The optical path of a monochromatic ligth is the same,if it goes through 2.0 cm of glass or 2.25 cm of water.If the refractive index of water is 4//3 ,what is the refractive index of glass?

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).