{"id":3198,"date":"2012-07-15T07:07:51","date_gmt":"2012-07-15T06:07:51","guid":{"rendered":"http:\/\/ekkehard-friebe.de\/blog\/?p=3198"},"modified":"2012-07-15T07:07:51","modified_gmt":"2012-07-15T06:07:51","slug":"what-the-global-positioning-system-tells-us-about-the-twins-paradox","status":"publish","type":"post","link":"https:\/\/ekkehard-friebe.de\/blog\/what-the-global-positioning-system-tells-us-about-the-twins-paradox\/","title":{"rendered":"What the Global Positioning System tells us about the twin’s paradox"},"content":{"rendered":"
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By Tom Van Flandern<\/span><\/a> <\/strong><\/p>\n

Beitrag aus dem GOM-Projekt: 2394 weitere kritische Ver\u00f6ffentlichungen<\/span> <\/a>
\n<\/strong>zur Erg\u00e4nzung der Dokumentation<\/span><\/a><\/strong> Textversion 1.2 \u2013 2004, Kapitel 4.<\/p>\n

What the Global Positioning System tells us about the twin’s paradox 2002
\n<\/strong>In: Episteme. An international journal of science, history and philosophy.
\nNr. 6, Parte 2. 2002, 21. Dez., ca. 10 S. =
\nhttp:\/\/itis.volta.alessandria.it\/episteme\/ep6\/ep6-II.htm<\/span><\/strong><\/a>\n<\/p>\n

"Abstract.<\/strong> – In the GPS, all atomic clocks in all reference frames (in orbit and on the ground) are set once and stay synchronized. We can use this same trick to place a GPS-type clock aboard the spacecraft of a travelling twin. That clock will stay synchronized with Earth clocks, allowing a clear resolution of the twin’s paradox in special relativity – why the traveller expects to come back younger, and why the stay at home twin is not entitled to the same expectation."<\/p>\n

Stellt die Lorentz-\u00c4ther-Theorie als Lorentz-Relativit\u00e4tstheorie von 1904 der SRT Albert Einsteins von 1905 gegen\u00fcber. Die SRT f\u00fchrt zwei Neuerungen ein:<\/p>\n

(1) f\u00fcr das 1. Postulat (RP) die "\u00c4quivalenz" = Gleichberechtigung aller Inertialsysteme (und damit Ausschaltung des \u00c4thers): "This first postulate of SR ["Einstein’s special relativity (SR)"] makes the Lorentz transformations reciprocal; i.e., they work equally well from any inertial frame to any other, then back again; so it has no meaning to ask which of two identical clocks in different frames is ticking slower in any absolute sense."<\/p>\n

(2) f\u00fcr das 2. Postulat (C-K) nicht nur die Unabh\u00e4ngigkeit der Lichtgeschwindigkeit von der Quelle, sondern auch von dem Bewegungszustand des Beobachters:<\/p>\n

"The second postulate of SR makes the speed of light independent of not only the speed of the source (which is also true generally for waves in any medium, including luminiferous ether), but also independent of the speed of the observer (which is a feature unique to SR)."<\/p>\n

Verweist darauf, da\u00df diese Postulate nie experimentell bewiesen worden sind: "Today, many physicists and students of physics have acquired the impression that these two postulates have been confirmed by observations.<\/p>\n

However, that is not the case. In fact, none of the eleven independent experiments verifying some aspect of SR [1] is able to verify either postulate."<\/p>\n

"Conclusions.<\/strong> – In LR ["Lorentzian relativity (LR) theory"], one reference frame (the local gravity field) is preferred; and speed cannot affect time, but only the rate of ticking of mechanical, electromagnetic, or biological clocks. However, just as we do not assume that time has been affected when the temperature rises and causes a pendulum clock to slow down, LR says that changes in clock rates are changes in the rates of physical processes, and do not affect space or time.<\/p>\n

So by carrying an on-board GPS clock on the spacecraft, we are offered a clear choice between models:<\/p>\n

Earth time can be what SR infers it is, or it can be what the GPS clock says it is. In the former case, SR works, but leads to heavy-duty complexities and fantastic inferences about the nature of time at remote locations.<\/p>\n

Moreover, the proof that nothing can travel faster than light in forward time stands intact. In the latter case, LR works with great simplicity and in full accord with our intuitions about the universality of the instant "now".<\/p>\n

And the speed of light is no longer a universal speed limit because time itself is never affected either by motion or by gravity.<\/p>\n

Aside from these practical difficulties with the use of SR in the GPS, Einstein’s special relativity is also under challenge in a more serious way from the "speed of gravity" issue, because the proven existence of anything propagating faster than light in forward time (as all experiments indicate is the case for gravity) would falsify SR outright [6, 7]. So it is entirely possible that reality is Lorentzian, not Einsteinian, with respect to the relativity of motion. In that case, physics may have no speed limit when the driving forces are gravitational or electrodynamic rather than electromagnetic in nature. And that may be the most important thing that the GPS has helped us to appreciate."<\/p>\n

Lesen Sie bitte hier<\/span><\/a><\/strong> weiter!<\/p>\n","protected":false},"excerpt":{"rendered":"

By Tom Van Flandern Beitrag aus dem GOM-Projekt: 2394 weitere kritische Ver\u00f6ffentlichungen zur Erg\u00e4nzung der Dokumentation Textversion 1.2 \u2013 2004, Kapitel 4. What the Global Positioning System tells us about the twin’s paradox 2002 In: Episteme. An international journal of science, history and philosophy. Nr. 6, Parte 2. 2002, 21. Dez., ca. 10 S. = […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-3198","post","type-post","status-publish","format-standard","hentry","category-projekt"],"_links":{"self":[{"href":"https:\/\/ekkehard-friebe.de\/blog\/wp-json\/wp\/v2\/posts\/3198"}],"collection":[{"href":"https:\/\/ekkehard-friebe.de\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ekkehard-friebe.de\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ekkehard-friebe.de\/blog\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/ekkehard-friebe.de\/blog\/wp-json\/wp\/v2\/comments?post=3198"}],"version-history":[{"count":0,"href":"https:\/\/ekkehard-friebe.de\/blog\/wp-json\/wp\/v2\/posts\/3198\/revisions"}],"wp:attachment":[{"href":"https:\/\/ekkehard-friebe.de\/blog\/wp-json\/wp\/v2\/media?parent=3198"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ekkehard-friebe.de\/blog\/wp-json\/wp\/v2\/categories?post=3198"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ekkehard-friebe.de\/blog\/wp-json\/wp\/v2\/tags?post=3198"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}