== History and Maxwell == 

 There is the statement: 

 :Maxwell's laws show that speed of light in a vacuum, c0 is related to the magnetic constant and the electric constant (vacuum permittivity)... 

 Which, as I understand it, is historically incorrect.  As I learned it, after Maxwell came up with the equations he determined that the speed of propagation of EM waves (that is, 1/sqrt(εμ)) was close to the measured speed of light, and therefore considered that light might be an electromagnetic wave.  The current version makes it sound like it was derived the other way around.