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Path: ...!2.eu.feeder.erje.net!feeder.erje.net!proxad.net!feeder1-2.proxad.net!usenet-fr.net!pasdenom.info!from-devjntp Message-ID: <cRRzT6nOqvNsNZkRCWbRl5usaUY@jntp> JNTP-Route: nemoweb.net JNTP-DataType: Article Subject: Re: The problem of relativistic synchronisation References: <m_uze6jFLkrMPuR4XaNmQntFPLY@jntp> <2VJMHmUL3oTjzHTxkbHeeVgwp1A@jntp> <vb2tvf$1ls0b$1@dont-email.me> <vb4sas$2u11j$1@dont-email.me> <FwN11HvPTqkgQgrbwnddFC1OY98@jntp> <vb79g4$3cout$1@dont-email.me> <FUkaOI4ar_TcsN7KN74WFA8f3Yw@jntp> <vbactr$3v15v$1@dont-email.me> <aUNR2GXBkc_bVoYI-Y6TV491wuE@jntp> <vbc7tk$at7q$2@dont-email.me> Newsgroups: sci.physics.relativity JNTP-HashClient: TYXWZFANCKehhpm94dXXMt0dukM JNTP-ThreadID: 76aXiNOmFXLuhuEL0ulE9Z2aOsc JNTP-Uri: https://www.nemoweb.net/?DataID=cRRzT6nOqvNsNZkRCWbRl5usaUY@jntp User-Agent: Nemo/1.0 JNTP-OriginServer: nemoweb.net Date: Thu, 05 Sep 24 14:15:28 +0000 Organization: Nemoweb JNTP-Browser: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36 Injection-Info: nemoweb.net; posting-host="e8cbf2474b472b9bb79db3dccb6a856bc1d05409"; logging-data="2024-09-05T14:15:28Z/9011471"; posting-account="4@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@wanadou.fr> Bytes: 2306 Lines: 36 Le 05/09/2024 à 14:24, "Paul.B.Andersen" a écrit : > Den 05.09.2024 01:23, skrev Richard Hachel: >> >> Vo=0.8c >> >> Vapp=Vo/(1+cosµ.Vo/c) >> >> Vapp'=(4/9)c >> >> Vapp"=4c >> >> R.H. > > BTW, your equation above is wrong. > > It should be: > Vapp = v⋅sin(μ)/(1 - (v/c)⋅cos(μ)) > > where μ is the angle between the observed object's > velocity and the line of sight. > > That is because we can only observe the transverse > component of the object's velocity. > > If the object is coming right at us, μ = 0⁰, and Vapp = 0. What do you say, Paul? > Note that v_app > c when v > c/(sin(μ)+cos(μ)) What's the matter with you? Are you drunk, or just insane? R.H.