NEET AIPMT SOLVED PAPER SCREENING 2011

  • question_answer
    Photoelectric emission occurs only when the incident light has more than a certain minimum

    A)  wavelength                      

    B)  intensity            

    C)         frequency         

    D)         power

    Correct Answer: C

    Solution :

    By the concept of threshold minimum frequency needed for photoelectric emission. \[\frac{1}{2}m{{v}^{2}}=h(v-{{v}_{0}})\] \[v\ge {{v}_{0}}\]


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