2 ms·
If you were moving in a "completely horizontal" direction, wouldn't you not be moving through time at all, but only through space? That means you could move inf
by joelmichael 16y ago
If you were moving in a "completely horizontal" direction, wouldn't you not be moving through time at all, but only through space? That means you could move infinitely fast, not with a strict limit.
- ars 16y agoNo, you would not be moving at all. Compared to yourself you are always standing still, and your clock always ticks at what you think is a normal rate. Other things may be moving relative to you though and THEIR clock might be slow. (Unless you accelerate, in which case things get more complicated.)
- uvdiv 16y agoYes, but that kind of motion (tachyonic) is unphysical. It violates causality: you can imagine that by "rotating" the "horizontal" motion very slightly "downwards", in a different reference frame it is backwards time travel. The salient thing is that there are three disconnected classes of 4-vectors: timelike (massive particles), spacelike (tachyons), and lightlike (massless particles). Lorentz coordinate transforms can only take you between 4-vectors of a particular type: e.g. there's no inertial reference frame where timelike motion looks like tachyonic motion.