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Uncertainty Principle and lifetime

  1. Dec 5, 2009 #1
    Hi all

    Please take a look here (just read the first paragraph): http://hyperphysics.phy-astr.gsu.edu/Hbase/quantum/parlif.html

    I am a little uncertain of why it is that we equal the spread in time ∆t to the lifetime of the excited state (in the above link they denote the lifetime by Γ). What allows us to do this?
  2. jcsd
  3. Dec 5, 2009 #2
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