JEE Main & Advanced Chemistry Structure of Atom Question Bank Dual nature of electron

  • question_answer What will be de-Broglie wavelength of an electron moving with a velocity of \[1.2\times {{10}^{5}}\,m{{s}^{-1}}\]             [MP PET 2000]

    A)                 \[6.068\times {{10}^{-9}}\]         

    B)                 \[3.133\times {{10}^{-37}}\]

    C)                 \[6.626\times {{10}^{-9}}\]         

    D)                 \[6.018\times {{10}^{-7}}\]

    Correct Answer: C

    Solution :

               \[\lambda =\frac{h}{p}\], \[p=mv\]            \[\lambda =\frac{h}{mv}\]\[=\frac{6.62\times {{10}^{-34}}}{9.1\times {{10}^{-31}}\times 1.2\times {{10}^{5}}}\]                 \[\lambda =6.626\times {{10}^{-9}}m\].

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