@blueshift
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Observations are not illusions. Particles moving at relativistic speeds will literally decay slower than twin particles in a lab
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I thought and correct me if am wrong that the particles rate of decay is identical only their position in space time relative to each other has changed so an observer at a static point in space-time will be under the illusion one particle has decayed slower than the other when all we have done is alter the positions in a flow of space-time by inputting energy into one particle but the speed through time of each particle has not altered meaning speed c?.
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Time is relative but space-time is not. You travel through space-time at speed c. You do not travel through space at speed c nor do you travel through time at speed c
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Here is where I have a problem and my questions begin I agree time is relative but not space-time, but the statement I travel through space-time at speed c. sounds like a contradiction of the first statement “Time is relative but space-time is not. “ I can see how I travel through time at speed c. a constant fixed rate but the rate at which I travel through space-time can be altered in relation to other objects which means my speed through space-time is not fixed.
@roger
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I think you need to consider the point of view put forward by Einstien, regarding the way that space and time works to an observer who is "on the outside looking in".
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I am trying but it is a lot to get my head round.
@cosmocrazy
I get confused by lots of things but i do agree your right on why the limits exist