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Help for selection rules

  1. Oct 28, 2009 #1

    KFC

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    I am reading some online article on Zeeman effect
    http://math.ucr.edu/home/baez/spin/node10.html
    In the article, the author mentions 4 selection rules, I wonder the corresponding transition is allowed by satisfying one of these selection rules or the corresponding line will be allowed only when all rules are satisfied?

    Thanks.
     
  2. jcsd
  3. Oct 31, 2009 #2

    clem

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    Science Advisor

    All four selection rules must be satisfied.
     
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