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The special theory of relativity describes the motion and dynamics of objects moving at significant fractions of the speed of light.

1 vote

What would happen if the light-speed in vacuum was higher?

Many, many things would change, but time as we observe it would not change. Specifically, the speed at which cesium vibrates (this is used to define a second) would remain the same. It's still an int …
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2 votes
5 answers
6k views

Special Relativity - Regarding the Simultaneity of Events During the Train Paradox

My questions concerns that classic train paradox, wherein there is a train and a tunnel of equal length, and the train is traveling and some fraction of the speed of light towards the tunnel. Accordi …
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0 votes
1 answer
46 views

Tensor indices from Ramond [closed]

I'm working through Pierre Ramond's "Field Theory: A Modern Primer". I can't connect the steps in I.2. Eq 2.6 (p. 7) gives a property of two linear transformations in relation to the Minkowski metric …
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