A plastic hemisphere has a radius of curvature of 8cm and an index of refraction of

A plastic hemisphere has a radius of curvature of 8 cm and an index of refraction of 1.6. ON the axis halfway between the plane surface and the spherical one (4 cm from each) is a small object O. The distance between the two images when viewed along the axis from the two sides of the hemisphere is approximately

A plastic hemisphere has a radius of curvature of 8 cm and an index of refraction of 1.6 . On the axis halfway between the plane surface and the spherical one ( 4 cm from each ) is a small object O . The distance between the two images when viewed along the axis from the two sides of the hemisphere is approximately .

A thin plano-convex lens acts like a concave mirror of radius of curvature 20 cm when its plane surface is silvered. The radius of curvature of the curved surface if index of refraction of its matarial is 1.5 will be

Power of biconvex lens is 10 diopters and radius of curvature of each surface is 10cm.Then refractive index of material of lens is

A plano convex lens of radius of curvature 30 cm and refractive index 1.5 is kept in air. Find its focal length (in cm).

A biconvex lens has a focal length half the radius of curvature of either surface. What is the refractive index of lens material ?

The concave surface of a thin concavo -convex lens of glass of refractive index 1.5 has a radius of curvature of 20cm .The concave surface has a radius of curvature of 60cm .The covnex side is silvered and placed on a horizontal surface as shown in the figure. The focal length of the combibnation has the magnitude.

The concave surface of a thin concavo -convex lens of glass of refractive index 1.5 has a radius of curvature of 20cm .The concave surface has a radius of curvature of 60cm .The covnex side is silvered and placed on a horizontal surface as shown in the figure. The combination behaves like