In http://www.freewebs.com/mouldy-fart/Space,%20Time%20and%20SR.pdf [Broken] paper the author wrote:(adsbygoogle = window.adsbygoogle || []).push({});

[tex]t'=\sqrt{\frac{4h^2}{c^2-v^2}}=\frac{2h}{\sqrt{c^2-v^2}}[/tex]

[tex]t'=\frac{2h}{\sqrt{c^2}}\frac{1}{\sqrt{1-\frac{v^2}{c^2}}}[/tex]

Why so?

Also, isn't the relativistic beta considered just v/c, not as the author stated (c/v)^2?

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# Math Question

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