Question

Q. 15. What is a wavefront? How is it related to rays
of light? What is the shape of the wavefront at a
point far away from the source of light? ​

Answer 1

Answer:

A Wavefront is defined as the locus of points that are in the same phase (a line or a surface) for a wave propagating by a source of the disturbance. Wavefronts are always perpendicular to rays of light. For a point far away from the source of the light wavefront is planar in shape as rays are parallel to each other.

For a point far away from the source of the light wavefront is planar in shape as rays are parallel to each other.