The Speed of Light: Explaining Theory & Experiments

462chevelle
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can anyone give me some good explanations or experiments about time and the speed of light. my knowledge at this point is kind of limited. I know the concept but can someone explain how its proven in theory or experiment.
thanks
 
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There is more stuff on the internet about this than you can shake a stick at. Surely you can do some research on your own and then come back with specific questions if there are things you don't understand?
 
There are loads and loads of good physics books which explain it as part of an explanation of something else =)
I recommend Max Born's Einstein's General Theory of Relativity, the whole first half of it explains these kinds of questions, even where the fundmental ideas about mass, force, movement etc. comes from and he explains some experiments and problems about calculating the speed of light. Have fun reading it if you do =)
 
i have been researching it online. but i can't seem to find anything more than what i generally read. I am curious. if getting closer to the speed of like makes time slow down, could you go back in time if you could go faster than the speed of light. is that possible to make an object go that fast? and what could possibly happen? or is this some left field idea that don't matter.
 
462C
Please search the Special Relativity forums. You should find lots of threads of interest.
 

Thread 'I don't see how a black hole's event horizon can be crossed'

OK, so this has bugged me for a while about the equivalence principle and the black hole information paradox. If black holes "evaporate" via Hawking radiation, then they cannot exist forever. So, from my external perspective, watching the person fall in, they slow down, freeze, and redshift to "nothing," but never cross the event horizon. Does the equivalence principle say my perspective is valid? If it does, is it possible that that person really never crossed the event horizon? The...
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Thread 'Synchronizing clocks in an inertial frame if light is anisotropic'

ASSUMPTIONS 1. Two identical clocks A and B in the same inertial frame are stationary relative to each other a fixed distance L apart. Time passes at the same rate for both. 2. Both clocks are able to send/receive light signals and to write/read the send/receive times into signals. 3. The speed of light is anisotropic. METHOD 1. At time t[A1] and time t[B1], clock A sends a light signal to clock B. The clock B time is unknown to A. 2. Clock B receives the signal from A at time t[B2] and...
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Thread 'Is the variation of the metric ##\delta g_{\mu\nu}## a tensor?'

From $$0 = \delta(g^{\alpha\mu}g_{\mu\nu}) = g^{\alpha\mu} \delta g_{\mu\nu} + g_{\mu\nu} \delta g^{\alpha\mu}$$ we have $$g^{\alpha\mu} \delta g_{\mu\nu} = -g_{\mu\nu} \delta g^{\alpha\mu} \,\, . $$ Multiply both sides by ##g_{\alpha\beta}## to get $$\delta g_{\beta\nu} = -g_{\alpha\beta} g_{\mu\nu} \delta g^{\alpha\mu} \qquad(*)$$ (This is Dirac's eq. (26.9) in "GTR".) On the other hand, the variation ##\delta g^{\alpha\mu} = \bar{g}^{\alpha\mu} - g^{\alpha\mu}## should be a tensor...
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