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Constraints on speed of light?

  1. Oct 4, 2009 #1
    The speed of light is fast but far from instantaneous. What constrains the speed of light to be what it is? e.g. c = f(xi)

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  2. jcsd
  3. Oct 4, 2009 #2


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    In the 1860's Maxwell found that c = [itex] \frac 1 {\sqrt {\epsilon_0 \mu_0} }[/itex]

    Where [itex] \epsilon_0 [/itex] is the permitivity and [itex] \mu_0 [/itex] is the permeability of free space.
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