Punjab Medical Punjab - MET Solved Paper-2003

  • question_answer
      golf-ball weigh\[40.0\,\,g\]. If it is moving with a velocity of \[20.0\,\,m{{s}^{-1}}\], its de-Broglie wavelength is:

    A) \[1.66\times {{10}^{-34}}\,\,nm\]            

    B) \[8.28\times {{10}^{-32}}\,\,nm\]

    C) \[8.28\times {{10}^{-25}}\,\,nm\]            

    D) \[1.66\times {{10}^{-24}}\,\,nm\]

    Correct Answer: C

    Solution :

    From de-Broglie equation,                 \[\lambda =\frac{h}{mv}\] \[\therefore \]  \[\lambda =\frac{6.626\times {{10}^{-34}}j\text{-}s}{40\times {{10}^{-3}}kg\times 20.0m{{s}^{-1}}}\]                 \[=8.28\times {{10}^{-34}}m\]                 \[=8.28\times {{10}^{-34}}\times {{10}^{9}}nm\]                 \[=8.28\times {{10}^{-25}}nm\]


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