On this page http://www.patent-invent.com/electricity/inventions/special_relativity_1.html [Broken](adsbygoogle = window.adsbygoogle || []).push({});

you are given that in a certain scenario

-(cT)^{2}= (vt)^{2}- (ct)^{2}

then it says Hence:

t=[tex]\frac{T}{\sqrt{1-v^{2}/c^{2}}}[/tex]

But this doesn't rearrange to that equation, and I don't like taking formulae as fact without seeing them derived or working them out for myself.

Obviously with next to no knowledge about special relativity at the moment, I stand no chance of deriving it for myself so can anyone point me to where it is shown, or maybe even do it?

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# Deriving t=T/√(1-v²/c²)

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