Twin paradox

<BLOCKQUOTE id=quote><font size=2 face="Verdana, Arial, Helvetica" id=quote>quote:<hr height=1 noshade id=quote>[Jan]: the twin that actually feels the acceleration can claim that he/she actually gained energy. ... Hence the acceleration is important in my view, otherwise no change in velocity can occur.<hr height=1 noshade id=quote></BLOCKQUOTE id=quote></font id=quote><font face="Verdana, Arial, Helvetica" size=2 id=quote>

(1) Cyclotron experiments have proved that force and acceleration per se have no effect on clocks or time, even at accelerations of 10^19 g.

(2) The turn-around can be done with an extremely gentle acceleration, one so slight that the traveling twin doesn't even notice. Sane result.

(3) The twins paradox can be set up with no accelerations at all. For example, a third traveling twin coming from the opposite direction and passing the 2nd twin at AC will achieve the same result, even though the third twin never accelerated.

(4) If the traveler orbits Alpha Centauri, his changing directions of motion (with no change of speed) will cause distant time on Earth to oscillate between the past and the future and back again, in phase with the orbit.

An explanation that makes more physical sense is in our <i>Meta Research Bulletin</i> 11, 39-46 (2002) article, "What the Global Positioning System tells us about the twins paradox", also available at Episteme #6 pt. II, (2002/12/21): [url] www.dipmat.unipg.it/~bartocci/ep6/ep6-vanfl.htm [/url]. -|Tom|-

<BLOCKQUOTE id=quote><font size=2 face="Verdana, Arial, Helvetica" id=quote>quote:<hr height=1 noshade id=quote>
(flandern)
(1) Cyclotron experiments have proved that force and acceleration per se have no effect on clocks or time, even at accelerations of 10^19 g.
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now i am confused-dont take much sometimes. so how do atomic clocks "slow down" in those airplane experiments? is not acceleration but their speed that does this?

cheers
self-teaching
dave

<BLOCKQUOTE id=quote><font size=2 face="Verdana, Arial, Helvetica" id=quote>quote:<hr height=1 noshade id=quote>
[TVF]: (1) Cyclotron experiments have proved that force and acceleration per se have no effect on clocks or time, even at accelerations of 10^19 g.
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Although thought experiments can never replace hard experimental results, such as the above, but it seems intuitively plausible, that is, the slowing of processes is explicitely linked with velocities, rather than accelerations, as numerous equations show us.
<BLOCKQUOTE id=quote><font size=2 face="Verdana, Arial, Helvetica" id=quote>quote:<hr height=1 noshade id=quote>
[TVF]: (2) The turn-around can be done with an extremely gentle acceleration, one so slight that the traveling twin doesn't even notice. Sane result.
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Agreed, but the acceleration does exist don't you think? It hasn't been nullified.
<BLOCKQUOTE id=quote><font size=2 face="Verdana, Arial, Helvetica" id=quote>quote:<hr height=1 noshade id=quote>
[TVF]: (3) The twins paradox can be set up with no accelerations at all. For example, a third traveling twin coming from the opposite direction and passing the 2nd twin at AC will achieve the same result, even though the third twin never accelerated.
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I'll definitely need to read more of this twin experiment and its possible configurations to give a reasonable response. Let me come to this at a later stage.

<BLOCKQUOTE id=quote><font size=2 face="Verdana, Arial, Helvetica" id=quote>quote:<hr height=1 noshade id=quote>
[TVF]: (4) If the traveler orbits Alpha Centauri, his changing directions of motion (with no change of speed) will cause distant time on Earth to oscillate between the past and the future and back again, in phase with the orbit.
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I believe that past and future time does not oscillate while the twin is orbiting Alpha Centauri with a constant speed, but it is quite possible that I do not really understand what it is you mean by this. Nevertheless, intuitively, you could argue that the traveling twin does not influence whatever happens on Earth. Her absurd D-tour does not influence processes here on earth. We just go on with our daily routines, but she is traveling near light speed far away from us, and by doing so, she manages to battle her aging by slowing down all processes. In any case, on her return, she'll need to enter our domain, so that things have to return to Earth-bound normalities for her.

<BLOCKQUOTE id=quote><font size=2 face="Verdana, Arial, Helvetica" id=quote>quote:<hr height=1 noshade id=quote>[kingdavid]: how do atomic clocks "slow down" in those airplane experiments? is not acceleration but their speed that does this?<hr height=1 noshade id=quote></BLOCKQUOTE id=quote></font id=quote><font face="Verdana, Arial, Helvetica" size=2 id=quote>

Correct. Only speed and gravitational potential can affect clock rates. Acceleration and gravitational force cannot. See < metaresearch.org/cosmology/gravity/gravity.asp >, and click on the link to "Gravitational Force vs. Gravitational Potential", or the link to get a free PowerPoint viewer if you need one. -|Tom|-

Thanks tom-also for the links, i have not looked at all the info on your site yet though.

When you saying clock rates change and the rate is measured how are the changes measured? Is the method really a redshift measurement? And of course, I presume the traveling of the twins is just a story or mind game of some sort-I am only guessing but I don't know of any data that has been assembled on such a voyage.