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Homework Help: Confining an electron

  1. Mar 2, 2010 #1
    What is the smallest 1D box in which you can confine an electron if you want to know for certain that the electron's speed is no more than 10m/s?

    I am guessing it has to do with the wave function, but I have no idea where to start...

    Any help would be great!!

  2. jcsd
  3. Mar 3, 2010 #2


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    Science Advisor
    Gold Member

    Think about the uncertainty principle...
  4. Mar 4, 2010 #3
    mmm i see it. v = p/m which p=h/2L where is the length of the box!
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