An electron and a proton each have the same non-relativistic kinetic energy
PHYSICS · Single correct · A Level · Physics · Particles and radiation · Particles and radiation
Problem
An electron and a proton each have the same non-relativistic kinetic energy. Which of the following correctly describes their de Broglie wavelengths?
(a) Both wavelengths are equal because their kinetic energies are equal.
(b) The proton’s wavelength is longer because it has the larger mass.
(c) The electron’s wavelength is longer because it has the smaller mass.
(d) The electron’s wavelength is shorter because its velocity is greater.