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    kirvey09's Avatar
    kirvey09 Posts: 2, Reputation: 1
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    #1

    Oct 2, 2012, 07:49 AM
    Wavelengths and electrons
    What is the wavelength of a tennis ball (66g) moving at 100m/s? The question goes on the ask how about an electron moving at the same speed?
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Oct 2, 2012, 07:57 AM
    Use the de Broglie equation:



    where 'h' is Planck's constant 6.626 x 10^(-34) J-s and 'p' is the object's momentum: p = mv.
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