I don’t think TIME is a dimension
If it were, how are seconds and meters reconciled into the same units under the radical?
(e.g. the distance between two events A and B in a 4-dimensional space
^√(∆x^2+∆y^2+∆z^2+∆t^2) where ∆x is in m, ∆y is in m ,∆z is in m and ∆t is in s
Or √(6m^2+1s^2)
Comment on ebaines's post
According to Quantum mechanics E=hv and Relativy says E=m*c^2, so m=h/c when v=c. The PHOTON is never at rest; but has kinetic mass.
Comment on ebaines's post
Clocks in orbit have to create anamolies on EM waves (like sound modulating a radio frequency). Every tick of the clock sends an anomly back and the monitoring on Earth will see the intervals between ticks be longer, so it will appear to be running slower, due to the doppler effect. If the tick interval is measured, in orbit, and a number is sent back, it will correspond to clock at rest. It does not matter what type of clock; it is the ticks that count. The only way of monitoring remote clocks, speeding away, is with EM signals.