Path: csiph.com!weretis.net!feeder6.news.weretis.net!feeder.usenetexpress.com!feeder-in1.iad1.usenetexpress.com!border1.nntp.dca1.giganews.com!nntp.giganews.com!buffer1.nntp.dca1.giganews.com!nntp.earthlink.com!news.earthlink.com.POSTED!not-for-mail NNTP-Posting-Date: Sat, 27 Oct 2018 11:19:20 -0500 Message-ID: <5BD49005.7873@ix.netcom.com> Date: Sat, 27 Oct 2018 09:19:17 -0700 From: The Starmaker Reply-To: starmaker@ix.netcom.com X-Mailer: Mozilla 3.04Gold (WinNT; U) MIME-Version: 1.0 Newsgroups: sci.physics.relativity Subject: Re: Light Falls in Gravity: Its Speed Increases or Decreases? References: Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Antivirus: Avast (VPS 181027-2, 10/27/2018), Outbound message X-Antivirus-Status: Clean Lines: 23 X-Usenet-Provider: http://www.giganews.com NNTP-Posting-Host: 108.219.229.47 X-Trace: sv3-t6SsTb3+aSX22M6Kl7HYciRWT37g8fSCque05dOxntaEbGwG/qTnIXYCgUvtCs0e5HRj8257z78oiTt!xoGOPOgLg0VqFfDwrb/dmW73OuWTq+UbZqywI51Fw6weJ/NXaoCa3IoUxNnhpCHc/YLzYsokgqIE!gCKoUXNq6Mk= 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: 1.3.40 X-Original-Bytes: 2766 Xref: csiph.com sci.physics.relativity:475700 Pentcho Valev wrote: > > Einstein's general relativity is absurd - it predicts that the speed of light falling in a gravitational field DECREASES: > > "Contrary to intuition, the speed of light (properly defined) decreases as the black hole is approached. [...] If the photon, the 'particle' of light, is thought of as behaving like a massive object, it would indeed be accelerated to higher speeds as it falls toward a black hole. However, the photon has no mass and so behaves in a manner that is not intuitively obvious." > http://www.physlink.com/Education/AskExperts/ae13.cfm > > "...you will find in section 3 of that paper Einstein's derivation of the variable speed of light in a gravitational potential, eqn (3). The result is: c'=c0(1+φ/c^2) where φ is the gravitational potential relative to the point where the speed of light c0 is measured. Simply put: Light appears to travel slower in stronger gravitational fields (near bigger mass). [...] You can find a more sophisticated derivation later by Einstein (1955) from the full theory of general relativity in the weak fi > > "Thus, as φ becomes increasingly negative (i.e., as the magnitude of the potential increases), the radial "speed of light" c_r defined in terms of the Schwarzschild parameters t and r is reduced to less than the nominal value of c." > > Actually the speed of falling light INCREASES (near Earth's surface the acceleration is g), as per Newton's theory: > > > > > http://web.pdx.edu/~pmoeck/books/Tipler_Llewellyn.pdf > > Pentcho Valev is gravity a distance force?