spacetime
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Posted by Muonium on June 19, 19101 at 23:38:58:
Hi!
"Time" is a parameter and not a physical quantity. If so, then,is 4D spacetime is a physical quantity or just a mathematical model giving answers that are experimentably verified. Now, I know that all theories are modellings but my question is for example, when we model about 3D we are modelling "physical" dimensions but in 4D this is not so. Further is 4D spacetime the only unique way to model Gravtiy/acceleration(i.e. apart from the newtonian way).
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