If a proton and electron have the same de Broglie wavelength, then

Options

A. kinetic energy of electron `lt` kinetic energy of proton
B. kinetic energy of electron = kinetic energy of proton
C. momentum of electron = momentum of proton
D. momentum of electron `lt` momentum of proton

Answer

C

Explanation

( c) : de Broglie wavelength, `lamda=(h)/(p)`
where p is the momentum of the particle
For electron, `lamda_(e)=(h)/(pe)`
Fro proton, `lamda_(p)=(h)/(p_(p))`
As `lamda_(e)=lamda_(p)rArrp_(e)=p_(p)` (Given)
or Momentum of electron = Momentum of proton