Article View: sci.physics
Article #16164Re: Why does light bend under gravity?
From: Pmb
Date: Tue, 01 Apr 2008 17:40
Date: Tue, 01 Apr 2008 17:40
24 lines
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3674 bytes
"Pentcho Valev" <pvalev@yahoo.com> wrote in message news:4136f86e-5fc3-4849-92e6-d42985e1f21c@c65g2000hsa.googlegroups.com... On Apr 1, 12:52 am, Tom Roberts <tjroberts...@sbcglobal.net> wrote in sci.physics: > Anon wrote: > > Because as you get closer to a massive body light is slowed down, this > > bends > > the rays of light towards the massive object. The same is true of other > > massive objects. That is what Einstein said. > > As I said before, Einstein said that in 1911, early on the > then-unfinished journey to General Relativity. GR itself does not really > have this property. Note: Einstein's first work on general relativity (e.g. the equivalence principle, gravitational time dilation. deflection of light, etc.) was in a paper published in 1907 called "On the Relativity Principle and the Conclusions Drawn from it," A. Einstein, Jahrbuch der Radioaktivitat und Elektronik 4 (1907): 411-462. And contrary to Roberts claim, GR *does( have this property. It is a very simple thing to derive. E.g. http://www.geocities.com/physics_world/gr/c_in_gfield.htm Pete
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X-Google-Thread: 10b271,1ea0cb1d54d3d906 X-Google-Thread: 10f545,2d47498f99950055 X-Google-Thread: f6c41,2d47498f99950055 X-Google-Thread: f74ae,c0039b44052ddae9 X-Google-Thread: fa4c1,c0039b44052ddae9 X-Google-Attributes: gid10b271,gid10f545,gidf6c41,gidf74ae,gidfa4c1,domainid0,public,usenet X-Google-Language: ENGLISH,ASCII-7-bit Path: arc1-ca.pugleaf.net!g2news1.google.com!news1.google.com!border1.nntp.dca.giganews.com!nntp.giganews.com!local02.nntp.dca.giganews.com!nntp.comcast.com!news.comcast.com.POSTED!not-for-mail NNTP-Posting-Date: Tue, 01 Apr 2008 12:40:37 -0500 Reply-To: "Pmb" <someone@someplace.com> From: "Pmb" <someone@someplace.com> Newsgroups: sci.physics,sci.physics.relativity,sci.physics.particle,sci.astro,fr.sci.physique References: <1de25376-cbdf-4a88-9c24-635b73e962f0@e60g2000hsh.googlegroups.com> <toRBj.16222$xq2.10827@newssvr21.news.prodigy.net> <a2ca4f30-9c55-4fa6-a0a1-cc7ad49e36a4@s37g2000prg.googlegroups.com> <e2b37da4-49a5-40da-95d8-c48add78539d@8g2000hse.googlegroups.com> <350f08c0-cbc4-43ca-9ece-629159f22125@h11g2000prf.googlegroups.com> <OzcDj.20839$Ej5.5102@newssvr29.news.prodigy.net> <35e2ae0d-b9b5-4f10-9dc2-b2cccd1bdf17@s12g2000prg.googlegroups.com> <tQgDj.1401$qT6.838@nlpi070.nbdc.sbc.com> <1da2434d-d5f2-42b0-8446-29bf7bdd10ef@d62g2000hsf.googlegroups.com> <a016b4ca-435e-4728-8752-ce65bfcaaab8@c19g2000prf.googlegroups.com> <0ae8640f-974b-44a5-a852-c0bc079e0c9c@a1g2000hsb.googlegroups.com> <9e6b26b9-ed18-44db-ad5e-12dfe2c44d67@z38g2000hsc.googlegroups.com> <QT4Ij.67633$w51.66473@fe2.news.blueyonder.co.uk> <VWdIj.30970$R84.12967@newssvr25.news.prodigy.net> <4136f86e-5fc3-4849-92e6-d42985e1f21c@c65g2000hsa.googlegroups.com> Subject: Re: Why does light bend under gravity? Date: Tue, 1 Apr 2008 13:40:16 -0400 X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2900.3138 x-mimeole: Produced By Microsoft MimeOLE V6.00.2900.3198 X-RFC2646: Format=Flowed; Original Message-ID: <T72dnRm-99wI7m_anZ2dnUVZ_qKgnZ2d@comcast.com> Lines: 26 X-Usenet-Provider: http://www.giganews.com NNTP-Posting-Host: 24.63.132.83 X-Trace: sv3-EK6ulCwZeGA/YnLwoMen3tr7aoRYhypYagI+J4aFI+L0BEcuj32PKGVBq/sTRKviDJr3AA/DqX8Aluh!ofJCCpB00I3Kb54zLR+k1Vb3Hj6VixD9r+m6PvYBVypfFAY0XmLcN7DMRYpvmu6BHN0cwzKQ1SDK!HqZkQKi8Iy2Bu6ojdp2VVqDNycfe X-Complaints-To: abuse@comcast.net X-DMCA-Complaints-To: dmca@comcast.net X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly X-Postfilter: 1.3.38