4 ms·
But let me also just say that you do not have to believe this at all in order to believe my original point; I just brought it up as an extreme crazy case. So i
by jblow 13y ago
But let me also just say that you do not have to believe this at all in order to believe my original point; I just brought it up as an extreme crazy case.
So if you don't believe the extreme crazy case, think of the standard example: you get into a space ship or something and zip around really fast. And you are thinking about things closer to you. The math says the same thing: as your light cone changes, the set of spacetime intervals, that have time distance 0 from you, changes as well. So from your relative position the "now" at these faraway points goes back and forth. This is basic, basic relativity.
- jblow 13y agoAnd actually, yeah, forget about the relative speed, since that is not central to the real issue. The real issue is just that when your light cone changes, the set of points that are simultaneous with you changes (all these points are outside your light cone except for the one you occupy). You cannot observe them directly because they are outside your light cone.