Article View: sci.physics.relativity
Article #5784Re: Fermat's principle and curved spacetime
From: Pentcho Valev
Date: Sat, 19 Jan 2008 07:31
Date: Sat, 19 Jan 2008 07:31
45 lines
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3251 bytes
On Jan 18, 11:03 pm, Dieter Heidorn <d.heid...@t-online.de> wrote: > Pentcho Valev schrieb: > > > 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. > > In his 1911 work "Über den Einfluss der Schwerkraft auf die Ausbreitung > des Lichtes", Annalen der Physik 35 (1911); translated: "On the > Influence of Gravitation on the Propagation of Light" Einstein uses the > equivalence principle to derive the relation for gravitational red-shift > > nu_1 = nu_2 (1 + V/c^2) > > From this he concluded that the speed of light must vary according to > > c = c_0 (1 + V/c^2) > > Using this equation Einstein derives a relation for the deflection angle > for light passing the sun (1911): > > alpha = 2 GM / (c^2 R) > > This is wrong by a factor 2. Can you sleep well? If you are a clever Einsteinian, I guess you cannot. Nightmares all night long. Pentcho Valev pvalev@yahoo.com
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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 Path: arc1-ca.pugleaf.net!g2news1.google.com!postnews.google.com!e25g2000prg.googlegroups.com!not-for-mail From: Pentcho Valev <pvalev@yahoo.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 23:31:24 -0800 (PST) Organization: http://groups.google.com Lines: 45 Message-ID: <0620abb3-5644-4d8a-afdc-c74b4e124662@e25g2000prg.googlegroups.com> References: <acc87498-7d1a-4bf8-b205-e24b29b6f04b@s8g2000prg.googlegroups.com> <v2Wjj.38861$lD6.27743@newssvr27.news.prodigy.net> <f45cdd6a-6cba-49f6-aef9-089ac65e4d1b@k2g2000hse.googlegroups.com> <fmr47v$fqo$03$1@news.t-online.com> NNTP-Posting-Host: 85.91.141.159 Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Trace: posting.google.com 1200727884 29200 127.0.0.1 (19 Jan 2008 07:31:24 GMT) X-Complaints-To: groups-abuse@google.com NNTP-Posting-Date: Sat, 19 Jan 2008 07:31:24 +0000 (UTC) Complaints-To: groups-abuse@google.com Injection-Info: e25g2000prg.googlegroups.com; posting-host=85.91.141.159; posting-account=Lz-LbgoAAABPDavKeW-eYeobwLHD_cvQ User-Agent: G2/1.0 X-HTTP-UserAgent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30),gzip(gfe),gzip(gfe)