Article View: sci.physics.relativity
Article #5407Re: THE BEST EXPLANATION OF LENGTH CONTRACTION
From: Rudolf Drabek
Date: Fri, 07 Mar 2008 09:47
Date: Fri, 07 Mar 2008 09:47
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On 6 Mrz., 21:31, Denis Feldmann <feldmann.denis.asuppri...@neuf.fr> wrote: > Rudolf Drabek a écrit : > > > > > I'm not good in understanding SR. > > I only want to know if I look to the situation from the pole's frame: > > So the distance between the barn doors is in any case too short, that > > the pole can fit into the barn. > > SR is symmetrical for time dilatation and length contraction, but not > > for this situation. > > Who can help me out. > > Easy: the whole scenario insist on *simultaneously closing the doors*, > and simultaneity is not an absolute concept, so there is no > contradiction. But, of course, any serious student of SR knows that, or > can redemonstrate it to him(her)self convincingly, so you will only find > crank answers here... I wanted to point out, that there are two scenarios and each one is *true* for the corresponding observer. Einstein spended a lot of time on that point regarding syncing clocks and simultaneity, here similar problems can be seen. I can accept two truth, only the symmetry is lost, which is a major part of SR. So, who can help me out? Length contr. is a consequence of c=const in all frames and not more.
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X-Google-Thread: 10f545,77eb89d693e39266 X-Google-Thread: 10b271,77eb89d693e39266 X-Google-Thread: fa4c1,77eb89d693e39266 X-Google-Thread: 1139f8,77eb89d693e39266 X-Google-Thread: f74ae,77eb89d693e39266 X-Google-Attributes: gid10f545,gid10b271,gidfa4c1,gid1139f8,gidf74ae,public,usenet X-Google-Language: ENGLISH,ASCII Path: arc1-ca.pugleaf.net!g2news1.google.com!news2.google.com!postnews.google.com!n77g2000hse.googlegroups.com!not-for-mail From: Rudolf Drabek <newsrudy@aon.at> Newsgroups: sci.physics.relativity,sci.physics,fr.sci.physique,fr.sci.maths,sci.astro Subject: Re: THE BEST EXPLANATION OF LENGTH CONTRACTION Date: Fri, 7 Mar 2008 01:47:49 -0800 (PST) Organization: http://groups.google.com Lines: 28 Message-ID: <dc2d0749-a41b-43a0-bd71-cc1f4248ccc3@n77g2000hse.googlegroups.com> References: <4caf8a21-acd0-42de-a040-842dcad0e000@n77g2000hse.googlegroups.com> <c40a0034-d54c-4d9f-91af-7117209af32a@e31g2000hse.googlegroups.com> <fqpka6$34o$1@netfinity.fr> NNTP-Posting-Host: 80.121.61.51 Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Trace: posting.google.com 1204883269 32164 127.0.0.1 (7 Mar 2008 09:47:49 GMT) X-Complaints-To: groups-abuse@google.com NNTP-Posting-Date: Fri, 7 Mar 2008 09:47:49 +0000 (UTC) Complaints-To: groups-abuse@google.com Injection-Info: n77g2000hse.googlegroups.com; posting-host=80.121.61.51; posting-account=zcyQSQkAAAApr2rJYdq1r1JKGLFoJ5Yb User-Agent: G2/1.0 X-HTTP-UserAgent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.1.12) Gecko/20080207 Ubuntu/7.10 (gutsy) Firefox/2.0.0.12,gzip(gfe),gzip(gfe)