Photon A has twice the momentum of photon B as both of them are traveling in vacuum. Which statements about these photons are correct? (There could be more than one correct choice.)
A) Photon A is traveling twice as fast as photon B.
B) Both photons have the same speed.
C) The wavelength of photon A is twice as great as the wavelength of photon B.
D) Both photons have the same wavelength.
E) The wavelength of photon B is twice as great as the wavelength of photon A.

Question

Quizplus · Accepted Answer

Photons always travel at the speed of light in a vacuum, so both have the same speed. Momentum of a photon is inversely proportional to its wavelength, so if photon A has twice the momentum of photon B, its wavelength is half that of photon B.

Photon a Has Twice the Momentum of Photon B as Both