Monday, March 19, 2018

special relativity - Why the interval equation have a minus sign?


its a famous equation $$\Delta s^2=-(c\Delta t)^2+(\Delta x)^2$$ but why do we put the minus sign i heard its there because of that space is ruled by non-Euclidean geometry rules and if that was true what is the difference between a Euclidean and non-Euclidean geometry?




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