Article View: sci.physics.relativity
Article #6854Re: Time dilation #2
From: harry
Date: Sun, 12 Apr 2009 17:12
Date: Sun, 12 Apr 2009 17:12
45 lines
3715 bytes
3715 bytes
"Henry Sharma" <hsharma@not-real.com> wrote in message news:49e20b5b.1940774265@news.gte.net... > "harry" <harald.vanlintelButNotThis@epfl.ch> wrote: >>...the above equation of mathpages does appear to be erroneous. Reminder, >>mathpages: "we have c_r =1+2phi, which corresponds to Einstein's 1911 >>equation, except that we have a factor of 2 instead of 1 on the >>potential term." > > That equation is correct, assuming "c_r" represents the radial speed > in Schwarzschild coordinates. What makes you think it isn't correct? Ai! I forgot that Pencho just cited the radial speed eventhough I noticed it in my earlier posting! Indeed, that's correct, thanks for reminding me. :-) >>Apparently the different light bending prediction of 1916 was due to an >>important detail of the calculation (which I never reproduced)... > > The calculation can be found in many good references (including the > mathpages you mentioned above), and the source of the doubling of the > deflection is clearly shown. In the meantime I found a more detailed calculation in the GRT textbook by Adler, Bazin and Schiffer. They repeat Einstein's calculation of double bending using the Huygens principle with more detail than Einstein in 1916. >> ... and not due to a change in the light speed equation as sometimes >> suggested in the literature. > > The same fact that causes the speed of light to be different in > different directions also results in the factor of 2 in the > deflection. Perhaps this is what the literature is suggesting? Perhaps. >>As a matter of fact, the information about this topic in the literature is >>both scarce and confused. > > I know a guy who was married fived times, and says each of his wives > was impossible to live with. :-)) Thanks, Harald
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X-Google-Thread: 10f545,acfc3e4fc9fc381c X-Google-Thread: 10b271,6e32c9a8d1ae8e9f X-Google-Thread: fa4c1,6e32c9a8d1ae8e9f X-Google-Thread: f74ae,6e32c9a8d1ae8e9f X-Google-Thread: 113e84,6e32c9a8d1ae8e9f X-Google-Attributes: gid10f545,gid10b271,gidfa4c1,gidf74ae,gid113e84,domainid0,public,usenet X-Google-Language: ENGLISH,ASCII-7-bit From: "harry" <harald.vanlintelButNotThis@epfl.ch> Newsgroups: sci.physics.relativity,sci.physics,fr.sci.physique,sci.astro,alt.philosophy References: <e2a8afa9-b9d7-4334-b043-132ace4ccb7f@e12g2000vbe.googlegroups.com> <PasDl.14344$pr6.12780@flpi149.ffdc.sbc.com> <e2a48506-5a3f-4077-901b-f87542dd785e@j8g2000yql.googlegroups.com> <49df1605_4@news.bluewin.ch> <452f830f-1287-4e58-84c7-f34aaf4adeba@k8g2000yqn.googlegroups.com> <49df27b9$1_3@news.bluewin.ch> <49df62d9$1_7@news.bluewin.ch> <49e20b5b.1940774265@news.gte.net> In-Reply-To: <49e20b5b.1940774265@news.gte.net> Subject: Re: Time dilation #2 Date: Sun, 12 Apr 2009 19:12:25 +0200 Lines: 46 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Windows Mail 6.0.6001.18000 X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6001.18049 X-Antivirus: avast! (VPS 090407-0, 07/04/2009), Outbound message X-Antivirus-Status: Clean NNTP-Posting-Host: 81.62.174.200 X-Original-NNTP-Posting-Host: 81.62.174.200 Message-ID: <49e22114$1_4@news.bluewin.ch> X-Trace: news.bluewin.ch 1239556372 81.62.174.200 (12 Apr 2009 19:12:52 +0200) Organization: Bluewin AG Complaints-To: abuse@bluewin.ch X-Original-NNTP-Posting-Host: 127.0.0.1 Path: arc1-ca.pugleaf.net!g2news1.google.com!news4.google.com!feeder.news-service.com!ecngs!feeder.ecngs.de!solnet.ch!solnet.ch!news-zh.switch.ch!switch.ch!news.ip-plus.net!newsfeed.ip-plus.net!news.bluewin.ch!not-for-mail