The discussion centers around the concept of dTau and its role in measuring time along a worldline in the context of spacetime. Participants explore the implications of marking time on a worldline and how proper time is experienced by different observers.
Participants express differing views on the nature of marking time on a worldline and the implications of proper time, indicating that multiple competing perspectives remain without consensus.
Limitations include the dependence on definitions of worldlines and proper time, as well as the unresolved implications of relative motion on time measurement.
The worldline is not a path through space; it's a path through spacetime. The person traveling on it already "chalks a mark" on the worldline every minute--all he has to do is watch the minute hand on his clock change. Each change of the minute hand is an event on the worldline--a "mark"--and these events are 1 minute apart.sqljunkey said:If the person traveling on that world line chalked marks on the world line every 1 minute
As Peter says,you can't really do this because you can't "chalk a mark" on spacetime. But the proper time along your worldline while you wait for the second hand of your watch sweep out one minute is one minute, yes.sqljunkey said:If the person traveling on that world line chalked marks on the world line every 1 minute, would those intervals be the same distance from each other?