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Re: is the speed of light the fastest speed possible?
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Originally Posted by Qfwfq
I see that you aren't a particle physicist, Pyro! ...We particle physicists  don't consider it a problem with SR at all. Never forget: It isn't c that's the speed of light, it's the speed of light that's c. In vacuo that is. The fact that propagation is slower than c in a material medium doesn't have any bearing at all on the geometry of space-time. Also, Cherenkov light isn't really the same thing as bremstrahlung radiation. ...The beam is often passed through layers of material before being used, further to the thin walls of the pillboxes ... |
Ahhhh, Qfwfq. How do you pronounce that, by the way? I see you aren't a professor of Medieval French poetry.
I stand corrected and am delighted to do so. The distinction that c is the speed of light in vacuo cleared up all my questions about Bremstrahlung most effectively. Thank you! And I was unaware that Ch. and Br. were independent phenomena.
However, the sentences that begin, "The beam is often..." is completely indecipherable to me. What were you trying to say there? 
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