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Unitless ratio

  1. Sep 6, 2003 #1
    I was wondering if any of you could help me out a little. I have this unitless ratio:

    1/(1.36*10^23) = 7.33*10*(-24) = ((e^2)(k))/((c)(h))
    (k=coulomb's constant & h = h-bar)

    i need to know what the significance of this number is, and apparently there is a lot.
  2. jcsd
  3. Sep 7, 2003 #2


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    This is the fine structure constant, denoted α. It sets the strength of the electromagnetic force.
  4. Sep 7, 2003 #3
    Best line ever!!!
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