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Wavelength limits of the Lyman and Paschen series of Hydrogen

  1. Oct 11, 2009 #1
    1. The problem statement, all variables and given/known data

    Use the Bohr theory to find the series wavelength limits of the Lyman and Paschen series of hydrogen.

    2. Relevant equations

    [tex]\lambda[/tex]=[tex]\lambda[/tex]limit(n2)/(n2-n02)

    Lyman: n0=1
    Paschen: n0=3

    3. The attempt at a solution

    The solutions are 91.13 nm (Lyman) and 820.1 nm (Paschen) but I do not know the process of finding them.

    Thanks for any help.
     
  2. jcsd
  3. Oct 12, 2009 #2

    gabbagabbahey

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    There's another equation relating the wavelength of an emitted photon to the quantum numbers [itex]n[/itex] and [itex]n_0[/itex]...use that equation and take the limit as [itex]n\to\infty[/itex] (why does this provide the limiting value of [itex]\lambda[/itex]?:wink: )
     
  4. Oct 13, 2009 #3
    Followed your hint; got the answer. Much appreciation.

    Thanks again,
    Jim
     
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