A Proton and an Electron Are Both Accelerated to the Same

Multiple Choice

A proton and an electron are both accelerated to the same final speed. If λ_p is the de Broglie wavelength of the proton and λ_e is the de Broglie wavelength of the electron, then

A) λ_p > λ_e.
B) λ_p = λ_e.
C) λ_p < λ_e.
D) Not enough data to answer this question.