Article View: sci.physics
Article #16179Re: Why does light bend under gravity?
From: Tom Roberts
Date: Sun, 16 Mar 2008 22:04
Date: Sun, 16 Mar 2008 22:04
27 lines
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3618 bytes
BradGuth wrote: > On Mar 16, 9:14 am, Tom Roberts <tjroberts...@sbcglobal.net> wrote: >> [about Shapiro time delay] > > But photons clearly represent mass, One must be very careful when attempting to say something like this, and the photon itself clearly has zero mass -- that is part of the definition of "photon". I have no idea what you mean by "represent" here. > thus the solar atmosphere of > photons does offer mass for other passing photons to interact with. When we say "solar atmosphere" we don't mean photons at all. We mean the usual sort of things that make up an atmosphere: gases and particulates floating in the gases. The total mass of the solar atmosphere is utterly negligible compared to the mass of the sun (just as it is for earth). I mentioned the solar atmosphere because some people think the Shapiro time delay is due to it (such an atmosphere has an altitude-varying index of refraction, which _could_ behave like the Shapiro time delay). It's just that actual measurements of the solar atmosphere and its properties completely refute that claim. Tom Roberts
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<1de25376-cbdf-4a88-9c24-635b73e962f0@e60g2000hsh.googlegroups.com> <YpBwj.12517$J41.7185@newssvr14.news.prodigy.net> <pan.2008.02.25.17.17.58@canonicalscience.com> <47C31602.1030806@guesswhatuia.no> <k887s35r0tqpss2mmaj14d9v70qblsjt3v@4ax.com> <7ad9324e-a185-4be5-8d37-36608dda682a@s37g2000prg.googlegroups.com> <6oe7s3t3ffk34ik95onbdq5i7ho1man8vh@4ax.com> <5d081222-5b36-4e82-b8d7-8900c2acbbc4@d4g2000prg.googlegroups.com> <L_mBj.16850$Ch6.2540@newssvr11.news.prodigy.net> <4a84042b-1718-45a4-82f9-0e2b9fa12240@x41g2000hsb.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>Show Full Headers
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X-Google-Thread: 10b271,1ea0cb1d54d3d906 X-Google-Thread: 10f545,2d47498f99950055 X-Google-Thread: f6c41,2d47498f99950055 X-Google-Thread: fa4c1,c0039b44052ddae9 X-Google-Thread: f74ae,c0039b44052ddae9 X-Google-Attributes: gid10b271,gid10f545,gidf6c41,gidfa4c1,gidf74ae,public,usenet X-Google-Language: ENGLISH,ASCII-7-bit Path: arc1-ca.pugleaf.net!g2news1.google.com!news2.google.com!newshub.sdsu.edu!newscon04.news.prodigy.net!prodigy.net!newsdst01.news.prodigy.net!prodigy.com!postmaster.news.prodigy.com!nlpi070.nbdc.sbc.com.POSTED!32b1cbcb!not-for-mail From: Tom Roberts <tjroberts137@sbcglobal.net> User-Agent: Thunderbird 2.0.0.12 (X11/20080226) MIME-Version: 1.0 Newsgroups: sci.physics,sci.physics.relativity,sci.physics.particle,fr.sci.physique,sci.astro Subject: Re: Why does light bend under gravity? References: <1de25376-cbdf-4a88-9c24-635b73e962f0@e60g2000hsh.googlegroups.com> <YpBwj.12517$J41.7185@newssvr14.news.prodigy.net> <pan.2008.02.25.17.17.58@canonicalscience.com> <47C31602.1030806@guesswhatuia.no> <k887s35r0tqpss2mmaj14d9v70qblsjt3v@4ax.com> <7ad9324e-a185-4be5-8d37-36608dda682a@s37g2000prg.googlegroups.com> <6oe7s3t3ffk34ik95onbdq5i7ho1man8vh@4ax.com> <5d081222-5b36-4e82-b8d7-8900c2acbbc4@d4g2000prg.googlegroups.com> <L_mBj.16850$Ch6.2540@newssvr11.news.prodigy.net> <4a84042b-1718-45a4-82f9-0e2b9fa12240@x41g2000hsb.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> In-Reply-To: <35e2ae0d-b9b5-4f10-9dc2-b2cccd1bdf17@s12g2000prg.googlegroups.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Lines: 27 Message-ID: <tQgDj.1401$qT6.838@nlpi070.nbdc.sbc.com> NNTP-Posting-Host: 71.147.38.213 X-Complaints-To: abuse@prodigy.net X-Trace: nlpi070.nbdc.sbc.com 1205705113 ST000 71.147.38.213 (Sun, 16 Mar 2008 18:05:13 EDT) NNTP-Posting-Date: Sun, 16 Mar 2008 18:05:13 EDT Organization: AT&T http://yahoo.sbc.com X-UserInfo1: SCSYQNONARTWSQ@YKROL^_PJFPIFBL@MAHU^_BAMEH]TCDYG^WHC@EK[WDXJHVKHGFFIZHBL@FX\NIOC@FWYNV\DMNS[HTLIXX\^BUGBXLR@PB@\FKCLXSWAIDFOKG^MFT[GZN^NWY_GVLSRGDYY^AW_MS_RW][KBYZMADO@Y[ABPSPE_TA@LTLFXVTC@RJM Date: Sun, 16 Mar 2008 17:04:39 -0500