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

  • question_answer
    Photon and electron are given same energy \[({{10}^{-20}}J)\]. Wavelength associated with photon and electron are \[{{\lambda }_{Ph}}\] and \[{{\lambda }_{el}}\] then correct statement will be   [RPMT 2001]

    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 \[\Rightarrow {{\lambda }_{\text{ph}}}>{{\lambda }_{e}}\]


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