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Path: ...!3.eu.feeder.erje.net!feeder.erje.net!proxad.net!feeder1-2.proxad.net!usenet-fr.net!pasdenom.info!from-devjntp Message-ID: <gQSP7T04xKx9wgapoySeijcbJi4@jntp> JNTP-Route: news2.nemoweb.net JNTP-DataType: Article Subject: Re: Sync two clocks References: <u18wy1Hl3tOo1DpOF6WVSF0s-08@jntp> <v9nant$1d2us$1@dont-email.me> <vPP1Z1BJfE1Dt7SYhCzEo7ZQWFI@jntp> <va0a4f$30p95$1@dont-email.me> <Zwwc8OsxqpAwTzvPkie6NmgxmY8@jntp> <va1tp9$3c0qh$1@dont-email.me> <lvwOM_tj8NJtPtaduqcmSRprOtk@jntp> <va2b62$3c12c$15@dont-email.me> Newsgroups: sci.physics.relativity JNTP-HashClient: 6rb9VgDkskCLb9Wbqg5QJXnpe68 JNTP-ThreadID: KqCy9G15x7A9xZN_JLsoNRe49xU JNTP-Uri: http://news2.nemoweb.net/?DataID=gQSP7T04xKx9wgapoySeijcbJi4@jntp User-Agent: Nemo/0.999a JNTP-OriginServer: news2.nemoweb.net Date: Tue, 20 Aug 24 15:28:22 +0000 Organization: Nemoweb JNTP-Browser: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36 Injection-Info: news2.nemoweb.net; posting-host="e8cbf2474b472b9bb79db3dccb6a856bc1d05409"; logging-data="2024-08-20T15:28:22Z/8993933"; posting-account="4@news2.nemoweb.net"; mail-complaints-to="julien.arlandis@gmail.com" JNTP-ProtocolVersion: 0.21.1 JNTP-Server: PhpNemoServer/0.94.5 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-JNTP-JsonNewsGateway: 0.96 From: Richard Hachel <r.hachel@jesauspu.fr> Bytes: 2849 Lines: 25 Le 20/08/2024 à 17:02, Python a écrit : > A clown is someone pretending that 3 can be 4 for some obervers. This is not exactly what I am saying. If we take the idea of a proper time, it is a relativistic invariant, and everyone, in all possible and imaginable frames of reference, will admit that the proper time is an invariant. It is this invariant that allows me to write To²=Tr²+Et² to replace the old formulation of the invariance of the space-time interval of little interest in RR. If tB=00'01" is noted on B's clock, it is obvious that what is written will be noted by all observers of all frames of reference, therefore whatever the aposition, and whatever the relative speed. What will vary is the time at which tB=00'01" occurred for any different and distant observer. As a general rule, no observer will find that this happened simultaneously, that is to say at the moment when his own watch will mark tX=00'01". This is not true for A if we understand what I am explaining. For A, when the event Tb takes place, it is already tA'=2. In short, for A, tB and tA' are simultaneous. I repeat, for A, tB and tA' are simultaneous. Have three cups of coffee, and perhaps you will understand why, without budging, I have been talking for 40 years about universal anisochrony. R.H.