JCECE Medical JCECE Medical Solved Paper-2007

  • question_answer
    In photoelectric effect, the electrons are ejected from metals if the incident light has a certain minimum

    A)  wavelength

    B)  frequency

    C)  amplitude

    D)  angle of incidence

    Correct Answer: B

    Solution :

     In photoelectric effect for a given photosensitive material, there exists a certain minimum cut-off frequency, called the threshold frequency, below which no emission of photoelectrons takes place no matter how intense the light is.


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