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NEET Sample Paper NEET Sample Test Paper-53

  • question_answer
    If the rest mass of electron or positron is 0.51 MeV, then the kinetic energy of each particle in the electron-positron pair production by a y-photon of 2.42 MeV will be-

    A) 0.3 MeV                       

    B) 1.9 MeV

    C) 0.7 MeV                       

    D) 1.5 MeV

    Correct Answer: C

    Solution :

    \[K=\frac{E-2{{m}_{e}}{{c}^{2}}}{2}\,\,=\,\,\frac{2.42-1.02}{2}\,\,=\,\,0.7\,MeV\]


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