If the wavelength of a photon in vacuum is the same as the de Broglie wavelength of an electron, which one is traveling faster through space?
A) The electron because it has more mass.
B) The photon because photons always travel through space faster than electrons.
C) They both have the same speed.

Question

Quizplus · Accepted Answer

Photons always travel at the speed of light in a vacuum, which is the maximum speed anything can travel through space. Electrons, having mass, cannot reach this speed.

If the Wavelength of a Photon in Vacuum Is the Same