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Originally Posted by Eroica
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Originally Posted by SeanF
Eroica, I don't think you're example deals with SR at all. Since both twins are constantly experiencing 1g, neither one of them is ever in an inertial frame, are they?
I'm not as up-to-speed (ha!) on GR as I am on SR, but my prediction would be that Peter and Paul would both be the same age at the end of this experiment . . . could be wrong, though.
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[-X SeanF, SeanF, you surprise me! And to think that I was just waiting for you to leap to my defence 
You're absolutely wrong here. Of that I'm sure. I stand over my figures. Peter (the traveller) will age just 20 years, while Paul will age 3348 years.
Neither of the twins is in an inertial frame of reference. That's correct. But if the GR effects are the same, then the age difference can only be explained by SR. |
I still say that the GR effects are not the same. If you wish to dismiss the obvious issue of acceleration change during the turn around segment of the trip, what about the initial part? As the twin is leaving the earth, he will experience >1g. That is, he will experience the force of the earth's gravity added to the 1G inertial force of the rockets acceleration. A similar argument could be made for the journey back. GR should be able to explain everything here. If I am not mistaken isn't GR a more "general" theory and hence it can explain everything SR can and more?