Messages in this thread |  | | Date | Mon, 27 May 1996 03:19:30 +1000 | From | Derek C Murphy <> | Subject | Re: Relativity [was incorrectly: Quantum Mechanics] |
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>Date: Mon, 27 May 1996 03:17:38 +1000 >To: Steve VanDevender <stevev@efn.org> >From: Derek C Murphy <dmurphy@extro.ucc.su.oz.au> >Subject: Re: Relativity [was incorrectly: Quantum Mechanics] > >At 00:55 25/05/96 -0700, you wrote: >>Mike Wangsmo writes: >> > Since this really has *nothing* to do with Linux, maybe we should >> > find an alternative list for this thread?? Any ideas there? >> >>There must be a "bad-physics" mailing list out there somewhere. >> >> > A beam of light that travels from a point on the edge of the outer >> > diameter of the base of the cone through the center is affected so >> > strongly by the massive gravity that it is slowed dramatically as it >> > finally escapes the forces of attraction from gravity. However an >> > object that travels around the base of the cone (thus avoiding the >> > massive gravity) has no noticable reduction in velocity due to >> > gravity. In essence according to Einsein's theories, the object >> > could travel at say 99.9% of speed of light (as measured on Earth) >> > and reach the far side of the base of the cone before the light beam >> > that left the same place and at the same time. >> >>Light doesn't speed up or slow down when it passes through a >>gravitational field. It may gain energy or lose energy or change >>direction, but it doesn't change speed. You can arrange to emit two >>photons in different directions from the same point and have them both >>pass through another point at different times by having one pass through >>a region of greater spacetime curvature, but that doesn't mean one >>photon traveled faster than the other -- it means one traveled farther >>than the other. Both traveled at the same speed, and all observers will >>measure the same speed for both photons. > >Wrong. The speed of light is affected by the medium it travels through. Ever heard of refraction. ;-) > >>You need to read and understand a good book on relativity theory. I >>suggest _Spacetime Physics_ by Taylor and Wheeler for an introduction. >>If you are then able to understand _Gravitation_ by Misner, Thorne, and >>Wheeler you will be doing better than I am. >> >> >> >
+------------------------------+ | Mr Derek Cunninghamme Murphy | | dmurphy@extro.ucc.su.oz.au | | Ph: +61 (0412) 008-444 | | Fax: +61 (02) 737-8445 | +------------------------------+
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