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A specific reference frame that describes its coordinates in a manner that does not depend on time and is isotropic.

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What does the Lorentz factor represent?

How can the Lorentz factor $\frac{1}{\sqrt{1-\frac{v^2}{c^2}}}$ be understood? What does that mean? For example, what is the reason for the second power and square root? Why not $\frac{1}{1-\frac{v}{c …
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