Q. A particle which has zero rest mass and non-zero energy and momentum, must travel with a speed
A) Equal to $c,$ the speed of light in vacuum
B) Greater than $c$
C) Less than $c$
D) Tending of infinity
Explanation
(a) Particle is photon and it travels with the velocity equal to light in vacuum
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.