JEE Main & Advanced Physics Photo Electric Effect, X- Rays & Matter Waves Question Bank Matter Waves

  • question_answer
    A photon, an electron and a uranium nucleus all have the same wavelength. The one with the most energy        [MP PMT 1992]

    A)            Is the photon

    B)            Is the electron

    C)            Is the uranium nucleus

    D)            Depends upon the wavelength and the properties of the particle.

    Correct Answer: A

    Solution :

                       \[\lambda =\frac{h}{mv}=\frac{h}{\sqrt{2mE}}:\] \[\therefore \ E=\frac{{{h}^{2}}}{2m{{\lambda }^{2}}}\]            \[\lambda \] is same for all, so \[E\propto \frac{1}{m}\]. Hence energy will be maximum for particle with lesser mass.


You need to login to perform this action.
You will be redirected in 3 sec spinner