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Article #578Re: VARIABLE SPEED OF LIGHT: FUNDAMENTAL THEOREMS
From: Sue...
Date: Wed, 28 Apr 2010 10:13
Date: Wed, 28 Apr 2010 10:13
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2792 bytes
On Apr 28, 12:42 am, Pentcho Valev <pva...@yahoo.com> wrote: > http://math.ucr.edu/home/baez/physics/Relativity/SR/barn_pole.html > "These are the props. You own a barn, 40m long, with automatic doors > at either end, that can be opened and closed simultaneously by a > switch. You also have a pole, 80m long, which of course won't fit in > the barn. Now someone takes the pole and tries to run (at nearly the > speed of light) through the barn with the pole horizontal. Special > Relativity (SR) says << the four-dimensional space-time continuum of the theory of relativity, in its most essential formal properties, shows a pronounced relationship to the three-dimensional continuum of Euclidean geometrical space. In order to give due prominence to this relationship, however, we must replace the usual time co-ordinate t by an imaginary magnitude sqrt(-1) ct proportional to it. Under these conditions, the natural laws satisfying the demands of the (special) theory of relativity assume mathematical forms, in which the time co-ordinate plays exactly the same rôle as the three space co-ordinates. >> http://www.bartleby.com/173/17.html
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X-Google-Thread: 237b8ad48,eedd9a86f7e317b1 X-Google-Attributes: gid237b8ad48,public,usenet X-Google-NewGroupId: yes X-Google-Language: ENGLISH,ASCII Path: arc1-ca.pugleaf.net!g2news1.google.com!news1.google.com!postnews.google.com!b23g2000yqn.googlegroups.com!not-for-mail From: "Sue..." <suzysewnshow@yahoo.com.au> Newsgroups: sci.physics.relativity,sci.physics,fr.sci.physique,fr.sci.astrophysique Subject: Re: VARIABLE SPEED OF LIGHT: FUNDAMENTAL THEOREMS Date: Wed, 28 Apr 2010 03:13:52 -0700 (PDT) Organization: http://groups.google.com Lines: 28 Message-ID: <ad4c70d4-964d-4f3e-a92f-16c126d97adc@b23g2000yqn.googlegroups.com> References: <483a4d42-81e7-4ee2-9531-7bd30c67301d@12g2000yqi.googlegroups.com> <7b80e74b-3994-4c95-a080-7f1b92163ba7@v14g2000yqb.googlegroups.com> <o-edndyGFogIvUrWnZ2dnUVZ_q6dnZ2d@insightbb.com> <11c22d79-8819-4203-bddd-6b2fd8132b5d@f6g2000yqa.googlegroups.com> <97d28ae2-1b58-4b91-ad4e-31c078236e3e@k41g2000yqf.googlegroups.com> NNTP-Posting-Host: 67.77.224.228 Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Trace: posting.google.com 1272449634 1023 127.0.0.1 (28 Apr 2010 10:13:54 GMT) X-Complaints-To: groups-abuse@google.com NNTP-Posting-Date: Wed, 28 Apr 2010 10:13:54 +0000 (UTC) Complaints-To: groups-abuse@google.com Injection-Info: b23g2000yqn.googlegroups.com; posting-host=67.77.224.228; posting-account=wigfZgkAAACDgITarXffzxJygX81YRSs User-Agent: G2/1.0 X-HTTP-UserAgent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.9) Gecko/20100330 Fedora/3.5.9-2.fc12 Firefox/3.5.9,gzip(gfe)