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Vacuum permittivity as a fundemental dimensioned unit

  1. Sep 23, 2011 #1
    As the usual argument goes, as I understand it, everything can be expressed in units of G, h and c. (though this argument exclude the particle masses from consideration.)

    The permittivity of the vacuum seems to be independent of G,h,c. Am I wrong?
     
  2. jcsd
  3. Sep 23, 2011 #2

    clem

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    epsilonzero is directly related to c.
     
  4. Sep 23, 2011 #3
    Yes, thank you. One combination of c and epsilon yields permeability.

    I was thinking of rephrasing, to ask if permeability and/or permittivity could be expressed in c,G,h, but the question is equivalent since mu nu c^2 = 1. The question is equal to asking about permeability.
     
    Last edited: Sep 23, 2011
  5. Sep 23, 2011 #4

    clem

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    muzero in SI is not a measured constant. It is arbitrarily defined as 4piX10^-7.
     
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