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Homework Help: De Broglie Wavelengths

  1. Sep 8, 2009 #1
    1. The problem statement, all variables and given/known data
    What is the de Broglie wavelength of a 10 microKelvin Rb atom? A 5000K electron?


    2. Relevant equations
    [tex]\lambda=\frac{h}{p}[/tex]
    V=[tex]\sqrt{\frac{3KT}{m}}[/tex]

    3. The attempt at a solution
    I used the velocity equation to find the velocity relating to temperature and mass. Then, as p=mv, I calculated the wavelength of the Rb atom to be 86.4nm. I just want to make sure my line of thinking is correct and that I can use a similar process for the electron.

    Thanks!
     
  2. jcsd
  3. Sep 8, 2009 #2
    Sounds good to me, just be careful if you're thinking about using that method for photons - you will go wrong!
     
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