Light from a point source in air falls on a spherical glass surface (n = 1.5 and radius of curvature = 20 cm). The distance of the light source from the glass surface is 100 cm. At what position the image is formed?

When light rays enter from one medium to another, refraction takes place. Consider refraction of light at a spherical surface separating two media of refractive indices n and n_2 (n_2 > n_1) .In the above case let the first medium be air and the second medium glass of refractive index 1.5, R of spherical surface = 20cm. An object is placed in air 100cm from the glass surface. At what position the image is formed?

Refraction of light is the phenomenon of change in the path of light ray when it goes from one medium to another.The radius of curvature of each face of a convex lens made of glass of refractive index 1.5 is 30 cm. Calculate the focal length of the lens in air.

A spherical surface of radius of curvature R, separates a rarer and a denser medium as shown in the figure. Complete the path of the incident ray of light, showing the formation of a real image.