VIT Engineering VIT Engineering Solved Paper-2011

  • question_answer
    The frequency of incident light falling on a photosensitive metal plate is doubled, the kinetic energy of the emitted photoelectrons is

    A)  double the earlier value

    B)  unchanged

    C)  more than doubled

    D)  less than doubled

    Correct Answer: B

    Solution :

    We know that \[{{\lambda }_{r}}>{{\lambda }_{y}}>{{\lambda }_{g}}\] The wavelength of red light is greater than threshold wavelength and hence no electrons are emitted.


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