Question

7. A plane wavelength is formed
(a) From a diverging spherical source of light.
O (b) From a converging spherical source of light.
O c) From any spherical source of light with small value of radius.
0 (d) with large enough radius tending to infinity of a spherical wavefront​

Answer 1

Explanation:

(d) with large enough radius tending to infinity of

a spherical wavefront