(i) Name the experiment which confirms the existence of wave nature of electrons. Derive the experience for de-brogile wavelength of an electron moving under a potential difference of V volts. (ii) An electron and a proton have the same kinetic Energy. which of these particles has the shorter de-broglie wavelength?
(i) Davisson - Germer experiment
An electron of charge e, mass m acclerated through a potential difference of v volts, Kinetic energy equals the work done (eV) on it by the electric field:
(ii) For same KE,
As mass of proton is greater than that of electron, (1/2) marks