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

  • question_answer
    The work function of aluminium is 4.2 \[eV.\] If two photons, each of energy 3.5 \[eV\]strike an electron of aluminium, then emission of electrons will be                                                      [AFMC 1999]

    A)            Possible

    B)            Not possible

    C)            Data is incomplete

    D)            Depend upon the density of the surface

    Correct Answer: B

    Solution :

               For emission of electrons incident energy of each photon must be greater than work function (threshold energy).


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