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Thoughts upon Special Relativity. Take the Frame of Reference of an observer in Spacetime. The observer's location is permanently (0,0,0,t) in that Frame of Reference.To that observer Spacetime is at rest, as it is mapped from his location and the rest of spacetime moves relative to him.Now, if that observer were to be holding a perfect clock, then that clock would, in effect, measure (provide, form) the time axis.Therefore, would it not be the case that the time coordinates in that frame constitute Proper Time, being time measured on a clock at rest, that is accompanying the worldline of that observer?To summarize: is the time measured by an observer, 'locally' in their own Frame of Reference, an instance of Proper Time?(while time in any other Frame of Reference, relative to them, will be coordinate time?)
Just to elaborate further any observer with a momentum that is constant in both magnitude and direction can be considered at rest in their own frame of reference. If all frames of reference everywhere had identical momentum then the universe would not exist. Since it would contain no energy. Therefore inertia alone is not enough to guarantee a well functioning universe. Ultimately this describes heat death.
Therefore, would it not be the case that the time coordinates in that frame constitute Proper Time, being time measured on a clock at rest, that is accompanying the worldline of that observer?
It confuses me when one refers to a body having momentum or "moving at a constant speed, near c"; for I feel that is implying that there is an absolute state of rest in Spacetime, yet is not all motion relative to the observer?
No. The proper time between two events refers only to the time as measured by a clock which passes through both events. The time coordinate in a frame is determined by a collection of clocks located throughout an observers frame of reference.
And are those clock not synchronised with the clock at the origin?
And is the clock at the origin not travelling along its worldline? And therefore displaying Proper Time?
I have a time question that may suit this thread or the correspondents in it. I am almost totally ignorant about physics, so i'd appreciate some gentleness if it is a totally stupid question. I understand that special relativity predicts that measured time is relative to the observer and to speed etc and that this is real and used in technology.If an observer were "God" and the entire universe were observed as a whole, it seems to me the case that in any given instant, everything must have a location. And in the next instant, everything must have a location. Everything everywhere must have a location in the universe, from leptons to galaxies at any given instant. The timing of instant to instant is the true forth dimension (0,0,0,t). I fail to see how this can be relative to anything, such a dimensional time must be a definition of time. Does this mean that measured/perceived/(proper?) time is different from dimensional/coordinate time? One is relative and one is not?
It raises the question, for me, why can't a distance be determined?
I understand that, from any particular "snapshot", velocity cannot be determined,...
The question may raise "curved space time", but predictably, I'm unclear why gravity should affect a dimension grid.
Btw, I'm also not religious and merely used "god" to give the problem a better view than man.
Maxwell's Demon (I like it already) is outside any observers frame of reference - so the dimension grid lines can/should be straight, unaffected by gravity. Time also.
is this "perfect grid" (straight, non bending, perfect time) scenario something that has been examined and dismissed as wrong or not useful/pointless?
edit...i read that Maxwell's Demon is more related to energy systems and equilibrium, 2nd law etc, but has been coopted to be magic elsewhere, so I'm happy to have it as a magic, frame of reference free, observer of the universe