0 Members and 1 Guest are viewing this topic.
If you look back at my post, you'll see that I said:"The "EPVGTD" equation says that the acceleration A will cause the HF to age faster than the AO by the factor exp(A d), where d is the constant separation between the AO and the HF."So there, I WAS talking about the rate. But then I said:"The change in the age of the HF, caused by an acceleration "A" that lasts "tau" seconds is just tau [exp(d)] sup A"
Wait. The HF spends 9.9 proper seconds (years, units, whatever) accelerating to .866c and you assert that he's still co-located with her after that? Try again.
Quote from: Halc on 04/09/2021 21:54:17The HF spends 9.9 proper seconds (years, units, whatever) accelerating to .866c and you assert that he's still co-located with her after that? Try again.The speed change is instantaneous.
The HF spends 9.9 proper seconds (years, units, whatever) accelerating to .866c and you assert that he's still co-located with her after that? Try again.
A statement of simultaneity without a frame reference is either an absolute statement or is meaningless
Neither she nor the HF move during the instantaneous speed change.
So, what to make of all these different and contradictory results?
The "EPVGTD Equation" (the one with the exponential), says that, if the AO (he) instantaneously changes his velocity in the direction TOWARD the home time (her), she instantaneously gets INFINITELY older, according to him.
The linearized equation (the LGTD equation) gives results that are qualitatively similar to the CMIF simultaneity method: her age instantaneously changes, according to him, during his instantaneous velocity change
WHY does the EPVGTD equation fail so miserably in this example?
Anybody is free to use any coordinate system they want, and if they both choose the same coordinate system, then they'll agree about their respective ages at all times. So for instance, when I'm in the car traveling to Grandma's house, I'm moving relative to Grandma, but both of us probably choose the coordinate system of the ground below us and hence are not in disagreement about our respective ages even while spatially separated.
So there you have it. That's the calculation that defines "NOW" for the AO and all of the HF's, and makes simultaneity at a distance a meaningful concept for them. Simultaneity at a distance is not a choice.