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NEET Sample Paper NEET Sample Test Paper-5

  • question_answer
    Two photons of energy \[2.5\text{ }eV\] fall on a metal plate, which was work-function of\[4.0\text{ }eV\]. Number of electrons ejected from the metal surface is:

    A)  one                

    B)  two

    C)  zero                

    D)  more than two

    Correct Answer: C

    Solution :

    Energy of photon is less than work function of material. So, there is no ejection of electron.


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