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Results tagged with spacetime
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user 101916
Within relativity (both special and general), changes of reference frames can change both the notions of space and of time, with one depending on the other as well. As a consequence, it is necessary to treat both concepts in a unified manner. Hence the term spacetime.
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How confident are we that we live in a universe that has at least a 4th spatial dimension?
Modern pop culture would have us believe that there is such a thing as the 4th spatial dimension. And yes it's easily shown that $n$ dimensions is possible using math alone and 3 just happens to be ou …
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What allows us to assume spacetime is flat when no normal matter is present?
Dark matter causes a bend in spacetime. We see this through gravitational lensing. But what allows us to assume spacetime is flat when no normal matter is present? … Why can't we say that dark matter is just the natural curvature of spacetime? Flat seems like a special case compared to the rest of possible geometries. …
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