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

  • question_answer
    The work function of sodium is 2.3 eV. The threshold wavelength of sodium will be                         [BHU 2003]

    A)            2900 Å                                     

    B)            2500 Å

    C)            5380 Å                                     

    D)            2000 Å

    Correct Answer: C

    Solution :

               \[{{W}_{0}}=\frac{12375}{2.3}=5380{\AA}\].


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