let's say we have two coordinate systems ( S-OXYZ and S'-O'X'Y'Z') , S' moving with velocity v away from S . At t=0 O=O'.(adsbygoogle = window.adsbygoogle || []).push({});

According to Lorentz' transformations we have :

At t=0 x in as a function of x' :

[tex]x=\frac{x'}{\sqrt{1-\beta^2}}=x'\gamma[/tex]

Now, say I know x(I just found it above) , and I want to find x'

[tex]x'=x\gamma=x'\gamma^2=>\gamma^2=1[/tex]

Where does this come from and what have I missed ?

Thank you !

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# X and x' in two coordinate relativistic systems

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