Thomas2
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picass said:Has anyone an idea why speed of light is constant ? Has this something to do with lack of mass of a photon because I cannnot imagine it to be possible to add speed to something that has no mass. As light emerges from energy fall of an electron, does speed of light have anything to do with rotation speed of an electron ?
The speed of light is constant because, unlike ordinary waves, light propagates without a carrier medium and you don't therefore have an absolute reference frame you could refer the speed to (at least not in a vacuum). The trick of nature is here that a light wave carries itself, or to be more precise, the electric wave carries the magnetic wave and vice versa (as given by Maxwell's equations). The irony is that even Maxwell apparently did not realize this and believed in the Ether Theory and a positive outcome of the Michelson-Morley experiment.
For related aspects see my webpage http://www.physicsmyths.org.uk/lightspeed.htm .