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

  • question_answer
    The photoelectric threshold wavelength of a certain metal is 3000Å. If the radiation of 2000Å is incident on the metal [MNR 1998; KCET 1994]

    A)            Electrons will be emitted

    B)            Positrons will be emitted

    C)            Protons will be emitted

    D)            Electrons will not be emitted

    Correct Answer: A

    Solution :

               For electron emission \[{{\lambda }_{\text{incident}}}<{{\lambda }_{0}}\]


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