Q. The wavefront of distant source of unknown shape is approximately
A) Spherical
B) Cylindrical
C) Elliptical
D) Plane
Explanation
(d) When the point source or linear source of light is at very large distance, a small portion of spherical or cylindrical wavefront appears to be plane. Such a wavefront is plane wavefront.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.