One end of a cylinrical rod is grounded to a hemispherical surface or rdius R=20 mm.It is immersed in water of refractive ndex 1.33.If the refractive index of the rodd is 1.50,find the position of the image of an object placed on the axis of the rod inside water at 10 cm from the pole.

An object is placed 30 cm in front of a plano-convex lens with its spherical surface of radius of curvature 20 cm. If the refractive index of the material of the lens is 1.5, find the position and nature of the image formed.

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 spherical convex surface of radius of curvature 20 cm, made of glass (mu=1.5) is placed in air. Find the positon of the image formed, if a point object is placed at 30 cm in front of the convex surface on the principal axis.

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 point object is placed in air at distance of 40 cm from concave refrating surface of refractive index 1.5.If rasius of curvature of he spherical urface is 20 cm,calcuulate the position of the image.

The radius of curvture of the convex face of a plano-covex lens is 12 cm and its refractive index is 1.5. Calculate the image distance,when a point object is paced on the axis 20 cm from the lens.

A glass prism of angle 72^@ and refractive index 1.66 is immersed in water of refractive index 1.33Find teh angle of minimum deviation for a parallel beam of light passingh through the prism.

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 .