A concave spherical surface of radius of curvature 100 cm separates two media of refractive indices 1.50 and `(4)/(3)`. An object is kept in the first medium at a distance of 30 cm from the surface. Calculate the position of the image.

A convex surface of radius of curvature 40 cm separate two media of refractive indices (4)/(3) and 1.50. An object is kept in the first medium at a distance of 20 cm from the surface. Calculate the position of the image.

A convex refracting surface of radius of curvature 20 cm separates two media of refractive indices 4//3 and 1.60 . An object is placed in the first medium (mu = 4//3) at a distance of 200 cm from the refracting surface. Calculate the position of image formed.

A concave spherical surface of radius of curvature 10 cm separates two medium x & y of refractive index 4/3 & 3/2 respectively. If the object is placed along principal axis in medium X then

A concave spherical surface of radius of curvature 10 cm separates two mediums X and Y of refractive indices 4//3 and 3//2 respectively. Centre of curvature of the surfaces lies in the medium X . An object is placed in medium X .

A concave spherical surface of radius of curvature R = 20 cm separates two media A and B having refractive indices mu_(A) =(4)/(3) and mu_(B) =(3)/(2) respectively. A point object is placed on the principal axis. Find the distance of the object from the surface so that its image is virtual when (a) the object is in medium A. (b) the object is in medium B.

A concave spherical refractive surface with radius R separates a medium of refractive index 5//2 from air. As an object is approaching the surface from far away from the surface along the central axis, its image