Q. Which of the following generates a plane wave front?
A) $\alpha - rays$
B) $\beta - rays$
C) $\gamma - rays$
D) None of these
Explanation
(d) In the given options none of sources generates plane wavefront, it can be artificially produced by reflection from a mirror or by refraction through a lens.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.