JEE Main & Advanced Physics Photo Electric Effect, X- Rays & Matter Waves Question Bank Topic Test - Photo Electric Effect, X-Rays & Matter Waves

  • question_answer
    The photoelectric threshold wavelength of a certain metal is 3000\[\overset{\text{o}}{\mathop{\text{A}}}\,\]. If the radiation of 2000\[\overset{\text{o}}{\mathop{\text{A}}}\,\] is incident on the metal

    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 :

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

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