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What is the equation?

  1. Apr 3, 2013 #1
    Hi all I was just wondering if anyone can tell us what the equation is that relates frequency and the energy of the initial and final states of a transition?
  2. jcsd
  3. Apr 4, 2013 #2


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    Staff: Mentor

    Hi Adam, welcome to PF!

    You'll have to be more specific if you want an answer. What physical system? What kind of transition? Frequency of what?
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