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JEE Main & Advanced Physics Photo Electric Effect, X- Rays & Matter Waves Question Bank Self Evaluation Test - Dual Nature of Radiation and Matter

  • question_answer
    Photoelectrons are ejected from a metal when light of frequency \[\nu \] falls on it. Pick out the wrong statement from the following.

    A) No electrons are emitted if \[\nu \] is less than Wl h, -where W is the work function of the metal

    B) The ejection of the photoelectrons is instantaneous.

    C) The maximum energy of the photoelectrons is hi).

    D) The maximum energy of the photoelectrons is independent of the intensity of the light.

    Correct Answer: C

    Solution :

    [c] According to photo-electric equation : \[K.E{{.}_{\max }}=hv-h{{v}_{0}}\] (Work function) Some sort of energy is used in ejecting the photoelectrons.


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