And you wouldn’t have to reverse causality to travel backwards in time. You would just have to travel faster than the speed of light.
If you can travel faster than the speed of light then you can arrive at a destination before you left.
I know practically nothing about all the wormhole theories, because I just don’t consider them relevant, but from a logical standpoint, the above does not feel correct to me.
The thing is, you would arrive at your destination before the light would arrive there from where you started. So, you could take out your telescope and potentially watch your own launch.
But that doesn’t actually put you into the past. It just looks like it when looking into the direction you came from. Light from the other direction will look like you’ve fast-forwarded through time, because you now get more recent imagery.
I don’t have another explanation why someone might think, this might put you into the past…
Pons_Aelius@kbin.social 11 months ago
Another term for the speed of light is the speed of causality as it is the rate with which causality propagates through the universe.
Traveling faster than the speed of light is, by definition, reversing causality.
Bizarroland@kbin.social 11 months ago
I think you're looking at it from the wrong frame of reference.
Technically, time is still moving forward. Time has not moved backwards on a universal scale, you have just traveled in such a way that you arrived at a point in time where your temporal reference frame is different than the rest of the time you are currently occupying.
Your causality has remained uninterrupted by traveling faster than the speed of light.
Traveling faster than the speed of light means that you have exited the universe and re-entered it at a different point.
At the point that your causality reintegrates with the current temporal causality that you find yourself in then a new causality is created.
Once again, this does not alter causality.
You've just put a stitch in time.