Manipal Engineering Manipal Engineering Solved Paper-2012

  • question_answer
    de-Broglie wavelength of a body of mass\[1\,\,kg\]moving with velocity of\[2000\,\,m/s\]is

    A) \[3.32\times {{10}^{-27}}\overset{\text{o}}{\mathop{\text{A}}}\,\]       

    B) \[1.5\times {{10}^{7}}\overset{\text{o}}{\mathop{\text{A}}}\,\]

    C) \[0.55\times {{10}^{-22}}\overset{\text{o}}{\mathop{\text{A}}}\,\]

    D)         None of these

    Correct Answer: A

    Solution :

    \[\lambda =\frac{h}{mv}=\frac{6.6\times {{10}^{-34}}}{1\times 2000}\]    \[=3.3\times {{10}^{-37}}m=3.3\times {{10}^{-27}}\overset{\text{o}}{\mathop{\text{A}}}\,\]


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