JCECE Engineering JCECE Engineering Solved Paper-2010

  • question_answer
    Photon and electron are given energy\[({{10}^{-2}}J)\]. Wavelengths associated with photon and electron are \[{{\lambda }_{ph}}\] and \[{{\lambda }_{el}}\] then, correct statement will be

    A) \[{{\lambda }_{ph}}>{{\lambda }_{el}}\]                               

    B) \[{{\lambda }_{ph}}<{{\lambda }_{el}}\]

    C) \[{{\lambda }_{ph}}={{\lambda }_{el}}\]                               

    D)  \[\frac{{{\lambda }_{el}}}{{{\lambda }_{ph}}}=c\]

    Correct Answer: A

    Solution :

    Wavelength of photon will be greater than that of electron because mass of photon is less than that of electron \[\Rightarrow \]                               \[{{\lambda }_{ph}}>{{\lambda }_{el}}\]


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