posted on Sep, 4 2016 @ 07:34 PM
a reply to: Bedlam
To further amplify Bedlam's point, go back to the historical development.
At one point, it was not recognized that light was electromagnetic. There were electromagnetic effects mostly discovered by Faraday, and then there
was optics. It was supposed that optical effects must be based on some kind of wave motion on something, which was called the luminerferous ether but
was otherwise unknown.
James Clerk Maxwell had the genius insight to add terms to the previously known electromagnetic laws and he found that now propagating waves were
possible even without charges and charge motion. And the numbers seemed to indicate that the propagation speed might be the same as that of light
So Maxwell discovered what the luminerferous ether was: it was the combined electric and magnetic field. That is the substrate of nature upon which
there are waves which make up the phenomenon of light.
It was further discovered experimentally that it does not have transformation properties like a Newtonian physical fluid or solid medium. It had
different kinds of waves than solids, and was not governed by the theory of elasticity (which is about waves in mechanical solids).
It was already relativistically correct and then Einstein had even more genius insight to recognize that Maxwell was 100% right and Newton needed
fixing---a radical position for the time.
edit on 4-9-2016 by mbkennel because: (no reason given)