On 12/29/2018 3:04 PM, John Clark wrote:
On Sat, Dec 29, 2018 at 4:10 PM Brent Meeker <[email protected]
<mailto:[email protected]>> wrote:
> /It's an example of a geodesic being the longest path (in
interval) between two events in 4-space.
/
I think you meant shortest path, there is no unique longest path it
can be made as long as you like.
John K Clark
No, I mean longest path. The stay-home twin experiences the longest
duration between departure and arrival of the traveling twin. The
traveling twin measures a shorter interval because he takes a
non-geodesic path. Because the metric signature is (+ - - - ) having a
longer spacial part means a shorter invariant interval (which is what a
clock measures).
Brent
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