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Homework Help: Revolutions in a Bohr Model

  1. Apr 12, 2005 #1
    According to the Bohr theory, how many revolutions will an electron make in the first excited state of hydrogen if the lifetime in that state is 10^-8?

    Basically do I find the speed of the that the electron moves in this excited state then get the distance that a revolution is and divide it by the time?
     
  2. jcsd
  3. Apr 12, 2005 #2

    dextercioby

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    Find the period for the first orbit and then use [itex]10^{-8}s [/itex] and the following reasoning

    1 revolution---------------------------->T

    x revolutions---------------------------->10^{-8}s

    Daniel.
     
    Last edited: Apr 12, 2005
  4. Apr 13, 2005 #3
    Right. When finding the period do I take velocity to be the speed of light?
     
  5. Apr 13, 2005 #4

    dextercioby

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    No,the velocity on the first orbit

    [tex] v_{I}=\alpha c [/tex]

    ,where [itex] \alpha [/itex] is the fine structure constant...

    Daniel.
     
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