A particle which has zero rest mass and non-zero energy and momentum must travel with a speed

Question

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 to infinity

Tardigrade Admin · Accepted Answer

Particle is photon and it travels with the velocity equal to light in vacuum.

Q. A particle which has zero rest mass and non-zero energy and momentum must travel with a speed

equal to c the speed of light in vacuum

greater than c

less than c

tending to infinity

Particle is photon and it travels with the velocity equal to light in vacuum.