Planck length, planck time, and planck rotation?
23359
Does the Planck scale imply that spacetime is discrete?
143235
Twin Paradox, calculating spacetime intervals from both perspectives
67661
Is there an observable of time?
57428
Physical Interpretation of Planck's Constant
48192
Staggered Indices ($\Lambda^\mu{}_\nu$ vs. $\Lambda_\mu{}^\nu$) on Lorentz Transformations
46510
Relativity and Galaxy Rotation Speed
38482
What is $\Delta t$ in the time-energy uncertainty principle?
31728
Galaxy rotation curve and dark matter
14274
Calculating de Broglie wavelength
42584
Curved space-time VS change of coordinates in Minkowski space
71092
What are the derivatives of position with respect to time
45763
Minkowski diagram and length contraction
64727
Total time derivatives and partial coordinate derivatives in classical mechanics
31703
How did Planck derive his formula $E=hf$?
124863
Performing Wick Rotation to get Euclidean action of a scalar field $\Psi$
50651
Does special relativity imply that time dilation is affected by an orientation of clocks?
83832
Time as a Hermitian operator in quantum mechanics