On 1/3/2014 7:24 AM, Jason Resch wrote:




On Fri, Jan 3, 2014 at 10:19 AM, Edgar L. Owen <edgaro...@att.net <mailto:edgaro...@att.net>> wrote:

    Jason,

    If the acceleration is the same, the slowing of clock time will be the 
same...
    Doesn't matter where it is. Or equivalently (by the principle of 
equivalence) it
    could be standing 'still' in a strong gravitational field.

    Edgar



Okay but this is certainly not what happens. If you spent 4 minutes accelerating and came back, there would not be a 4 year age difference when Pam returned.

Right. Edgar is just wrong. The same applies to the gravitational field. The time dilatation is purely a geometrical effect. Lewis Carroll Epstein's little book, "Relativity Visualized" provides a nice explanation and examples.

Brent

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