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Roger Kujawa asked the Naked Scientists: Hi Chris and all:Thanks for the show. I really enjoy listening. I have a question about light. From what I gather nothing can go faster than light. How do we know?Secondly, I think I heard that light has no mass and you can't find enough power to push something with mass to the speed of light. If this is so, how come light can be bent by gravity or not escape from black holes? It would seem to be contradictory.Thanks again,RogerMorton, IL. USA What do you think?
And no, if the neutrinos would have been FTL (superluminous) they would also have needed to be of a 'imaginary mass' which they aren't, as far as I know? We have proofs for them having a very slight rest mass, which should mean that they also have a acceleration, in contrast to 'bosons' as light which does not accelerate at all. So it would have destroyed relativity as I see it, if true.As for how Einstein defined Lights speed he firstly used Maxwell's equations in SR which can be shown to be a 'constant'. There are other ways nowadays but that was his beginning as I seen it. some folks drag in a lot of stuff and assumptions in that and want it to be anything but Maxwell but Einstein himself states it. And you got to remember that this theory is now over a hundred years old and a lot of people expect QM to supersede it somehow, although Relativity firstly is a 'macroscopic' model of 'reality' whereas QM is a 'microscopic'. But I'm getting quite tired of those wanting Einstein to lose his reputation, it, to be perfectly honest, sux. And it comes from people that don't have the brains to make their own ideas.
Possibly, can you source it for me? This is how I think of imaginary mass. Still, what can be said is that a neutrino is expected to have a 'rest mass', and so be inside our arrow (The ability of a single neutrino to shift identity over the course of its travels) and that makes it unlikely for me. And tachyons etc don't exist in our arrow, well, as far as I know.=Or SpaceTime, if you find that more suitable than a arrow?