Question

what is ray of light ?

Answer 1

A light ray is a line (straight or curved) that is perpendicular to the light'swavefronts; its tangent is collinear with the wave vector. Light rays in homogeneous media are straight. They bend at the interface between two dissimilar media and may be curved in a medium in which the refractive index changes

Answer 2

Ray of light is used for formation of images when image is placed at different positions in front of convex mirror the