DescriptionXctauRodContraction.png English: An x-cτ plot of length contraction for a rod (in blue) traveling rightward with a proper-speed of w ≡ dx/dτ...
DescriptionXct xctau rhoctau.png English: An x-ct, x-cτ and ρ-cτ triad of space-time plots for constant speed time-dilation (green) over a proper-time...