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Basic Formula?

  1. Oct 30, 2009 #1
    For some unknown reason, my 6 kilogram physics textbook doesnt explain the formula:

    (me^4 / 8e0^2 h^2 ) x 1/ n^2

    Where n is the state number.
    Im just wondering what the me is, it is not m(subscript e) but just me both lowercase, e0 is greek epsilon subscript zero.. Could someone help me out, thanks
  2. jcsd
  3. Oct 30, 2009 #2
    it's m times e^4, where m is electron mass and e is electron charge.
  4. Oct 30, 2009 #3
  5. Oct 31, 2009 #4
    Substitute α = e2/4 pi ε0 h c

    where α = 1/137 = fine structure constant

    Bob S
  6. Oct 31, 2009 #5
    h should be hbar in here.
  7. Oct 31, 2009 #6
    You're right. My hbar key isn't working. It would be nice to have hbar in the copy and paste thread:https://www.physicsforums.com/blog.php?b=347 [Broken]
    Bob S
    Last edited by a moderator: May 4, 2017
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