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

  • question_answer
    The threshold wavelength for photoelectric effect of a metal is 6500 Å. The work function of the metal is approximately                   [MP PMT 2002]

    A)            2 eV                                         

    B)            1 eV

    C)            0.1\[eV\]                               

    D)            3 eV

    Correct Answer: A

    Solution :

               \[{{\lambda }_{0}}=\frac{12375}{6500}=1.9\ eV\approx 2eV\].


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