A photon is a particle that
A. has zero electric charge.
B. has zero electric field associated with it.
C. cannot travel in a vacuum.
D. has a velocity in a vacuum that varies with the photon frequency.
Answer:A
A photon is a particle that
A. has zero electric charge. B. has zero electric field associated with it. C. cannot travel in a vacuum. D. has a velocity in a vacuum that varies with the photon frequency.