O is a point object kept on the principal axis of a concave mirror
M of radius of curvature
20 cm.
P is a prism of angle
1.8∘. Light falling on the prism (at small angle of incidence) gets refracted through the prism and then falls on the mirror. Refractive index of the prism is
3/2. Find the distance between the images formed by the concave mirror due to this light.