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Path: ...!news.nobody.at!weretis.net!feeder8.news.weretis.net!pasdenom.info!from-devjntp Message-ID: <fWVxB-CaI3OPmflPvIbZCm2qU00@jntp> JNTP-Route: news2.nemoweb.net JNTP-DataType: Article Subject: Re: Langevin's paradox again References: <FER4K03RCuXsBiIlfVNSgR0vilQ@jntp> <FlDiO.56506$GVTf.837@fx01.ams4> <lf40ddFdu9kU3@mid.individual.net> <Qjq15Muw8aIiGRVOKV0Bu2oT9_k@jntp> <v6mlhe$21277$2@dont-email.me> Newsgroups: sci.physics.relativity JNTP-HashClient: 0L1jY_0UmtzqLMCjGzzzXD-ZSDA JNTP-ThreadID: sxhQQgyUgiiv6OcO_6O_beeL7bk JNTP-Uri: http://news2.nemoweb.net/?DataID=fWVxB-CaI3OPmflPvIbZCm2qU00@jntp User-Agent: Nemo/0.999a JNTP-OriginServer: news2.nemoweb.net Date: Wed, 10 Jul 24 20:47:05 +0000 Organization: Nemoweb JNTP-Browser: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.36 Injection-Info: news2.nemoweb.net; posting-host="e8cbf2474b472b9bb79db3dccb6a856bc1d05409"; logging-data="2024-07-10T20:47:05Z/8942405"; 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@tiscali.fr> Bytes: 2583 Lines: 32 Le 10/07/2024 à 20:56, "Paul.B.Andersen" a écrit : > Let's look at the following scenario: > > - Twin A and twin B are inertial and co-located. > - Twin B accelerates at the proper acceleration 2 c/year > away from A for 1 light year [ly] in A's rest frame. > - Twin B coasts (no engine) for 8 light years until he is 9 ly from A. > - Twin B accelerates at 2 c/year towards A. He will reach 10 ly and > go back to 9 ly when he stops the engine. > - Twin B coasts from 9 ly to 1 ly- > - Twin B accelerates at 2 c/y until he is co-located with A. > > Note: > While B is coasting and inertial we have two inertial twins > moving at the constant speed 0.943 c relative to each other, > and both will measure the other twin's clock to run slow by > the factor 0.333. > Yet B ages 9.18 years while A ages 22.63 y. > > B's accelerations make all the difference. > > The greatest relativistic physicist in the universe > (Richard Hachel) will probably not read this, > and if he does i won't understand it. Yes, your post appears, and I can read it. I will answer it. I think you're making a mistake in the concept, and I should easily explain why. R.H.