Article View: sci.physics.relativity
Article #5779Re: Fermat's principle and curved spacetime
From: JanPB
Date: Fri, 18 Jan 2008 20:46
Date: Fri, 18 Jan 2008 20:46
29 lines
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2610 bytes
On Jan 17, 11:03 pm, Pentcho Valev <pva...@yahoo.com> wrote: > On Jan 18, 6:37 am, Tom Roberts <tjroberts...@sbcglobal.net> wrote in > sci.physics.relativity: > > > Albertito wrote: > > > Then, why did Einstein propose a local speed of light as > > > c'= c(1 + V/c2)? > > > Because he was struggling to find General Relativity, but had not yet > > figured out all the details. His intermediate formula is approximate, > > but not correct. When he proposed it he did not fully understand the > > difference between local and non-local phenomena. > > > Tom Roberts > > Roberts Roberts, Einstein's 1911 equation c'=c(1+V/c^2) is consistent > with the gravitational redshift factor 1+V/c^2 confirmed > experimentally by Pound and Rebka. V=RI is also consistent with many experiments. It's also approximate. So is F=kx, etc. > In other words Roberts Roberts, the > equation c'=c(1+V/c^2) is CORRECT, NOT APPROXIMATE: In other words, it' doesn't follow. -- Jan Bielawski
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X-Google-Thread: 10f545,e60ad8b8bd890c74 X-Google-Thread: 10b271,4fd262761489fde X-Google-Thread: f74ae,4fd262761489fde X-Google-Thread: fa4c1,4fd262761489fde X-Google-Thread: 1139f8,4fd262761489fde X-Google-Attributes: gid10f545,gid10b271,gidf74ae,gidfa4c1,gid1139f8,public,usenet X-Google-Language: ENGLISH,ASCII-7-bit Path: arc1-ca.pugleaf.net!g2news1.google.com!postnews.google.com!m34g2000hsb.googlegroups.com!not-for-mail From: JanPB <filmart@gmail.com> Newsgroups: sci.physics.relativity, sci.physics, sci.astro, fr.sci.physique, fr.sci.maths Subject: Re: Fermat's principle and curved spacetime Date: Fri, 18 Jan 2008 12:46:38 -0800 (PST) Organization: http://groups.google.com Lines: 29 Message-ID: <631864b7-315e-4b2d-b73c-8d7d649db63a@m34g2000hsb.googlegroups.com> References: <acc87498-7d1a-4bf8-b205-e24b29b6f04b@s8g2000prg.googlegroups.com> <v2Wjj.38861$lD6.27743@newssvr27.news.prodigy.net> <f45cdd6a-6cba-49f6-aef9-089ac65e4d1b@k2g2000hse.googlegroups.com> NNTP-Posting-Host: 63.114.26.15 Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Trace: posting.google.com 1200689198 30294 127.0.0.1 (18 Jan 2008 20:46:38 GMT) X-Complaints-To: groups-abuse@google.com NNTP-Posting-Date: Fri, 18 Jan 2008 20:46:38 +0000 (UTC) Complaints-To: groups-abuse@google.com Injection-Info: m34g2000hsb.googlegroups.com; posting-host=63.114.26.15; posting-account=Y2v6DQoAAACGpOrX04JGhSdsTevCdArN User-Agent: G2/1.0 X-HTTP-UserAgent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.11) Gecko/20071127 Firefox/2.0.0.11,gzip(gfe),gzip(gfe)