The Total solution for NCERT class 6-12
What is the shape of thewavefront in each of the following cases:
(a) Light diverging from a pointsource.
(b) Light emerging out of a convexlens when a point source is placed at its focus.
(a) The shapeof the wavefront in case of a light diverging from a point source is spherical.The wavefront emanating from a point source is shown in the given figure.
(b) Theshape of the wavefront in case of a light emerging out of a convex lens when apoint source is placed at its focus is a parallel grid. This is shown in thegiven figure.
(c) Theportion of the wavefront of light from a distant star intercepted by the Earthis a plane.