41
Physics, Astronomy & Cosmology / Re: Does time have more than one direction?
« on: 11/12/2022 00:05:46 »Quotewe are already assuming a direction of time when we define an object to be at restAn object at rest displays no direction of time. It is stationary and unchanging.
- A moving object (in our frame of reference) with no external forces displays a progress of time: At time t=a it is at position y=1, at a later time t=2a, it is at position y=2.
- A moving object (in our frame of reference) with no external forces does not display a direction of time: If we assume that time is reversed (including for the observer): At time t=2a, it is at position y=2, and at a subsequent time t=a it is at position y=1 (remember, time is going backwards!). But from the (time-reversed) view of the observer, he still see: At time t=a it is at position y=1, at a later time t=2a, it is at position y=2
I hope this isn't frustrating, but now I am more confused. If an object at rest has no direction in time and an object in motion has no direction in time, then what would have a direction in time?