Answer:
A wavefront is a surface obtained by joining all points vibrating in the same phase. A ray is line drawn perpendicular to the wavefront in the direction of propagation of light wave. The wavefronts of light emerging from a point source are spherical as shown in Fig. (a). When a point source is placed at the focus of a convex lens, the emerging light has plane wavefronts, as shown in Fig. (b).
You need to login to perform this action.
You will be redirected in
3 sec