What is the shape of the wavefront if the shape of the source of light is linear?
The shape of the wavefront of a linear source of light is cylindrical in shape.
What is the shape of the wavefront in each of the following cases:(a) Light diverging from a point source.
(b) Light emerging out of a convex lens when a point source is placed at its focus.
(c) The portion of the wavefront of light from a distant star intercepted by the Earth.