New posts in Special Relativity

Is proper time equal to the Invariant Interval or the time elapsed in the Rest Frame?

How is length contraction on rigid bodies possible in special relativity since definition of rigid body states they are not deformable?

On what things can two observers agree or disagree?

Does the first postulate of special relativity imply constant speed of light?

Meaning of simultaneity in special relativity

Do time dilation and length contraction cancel out?

Ordering of Indices in $\Lambda^\mu_{\space\space\nu}$

Can mass-energy equivalence be used to measure absolute internal energy?

Do I have the correct idea of time dilation?

Is velocity an angle?