If a proton and an electron have the same de Broglie wavelengths,which one is moving faster?
A)the electron
B)the proton
C)They both have the same speed.

Question

Quizplus · Accepted Answer

The wavelength of a particle is inversely proportional to its momentum. Since the mass of a proton is much larger than that of an electron, the proton would need to have a much lower velocity in order to have the same wavelength as an electron. Therefore, the electron must be moving faster.

If a Proton and an Electron Have the Same De