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Groups > sci.physics.relativity > #666666
| From | Thomas Heger <ttt_heg@web.de> |
|---|---|
| Newsgroups | sci.physics.relativity |
| Subject | Re: The problem of simultaneity |
| Date | 2025-10-16 07:02 +0200 |
| Message-ID | <mlbc9rFf3ktU4@mid.individual.net> (permalink) |
| References | (10 earlier) <LTL5R06ZZHzFv-F-2xx4FpjgHEE@jntp> <ml3ihhF2j2qU1@mid.individual.net> <IQcHQ.52846$7E53.19542@fx13.ams4> <ml91d0F3casU1@mid.individual.net> <rlRHQ.96$Aa1d.19@fx03.ams4> |
Am Mittwoch000015, 15.10.2025 um 20:05 schrieb Paul B. Andersen: > Den 15.10.2025 09:44, skrev Thomas Heger: >> Am Montag000013, 13.10.2025 um 21:59 schrieb Paul B. Andersen: > >>> >>> What the display on a 'clock' shows is a 'point in time'. >>> >>> I can say that the 'time' now is October 13, 2025, 14:34:32 CET >>> That's 'a point in time'. >>> >>> If I left my home at t1 = October 13, 2025, 7:05:10 CET >>> and arrived at work at t2 = October 13, 2025, 7:59:50 CET >>> Then I can say that the 'time' I used to walk to work today >>> was 54 minutes and 40 seconds. (Δt = t2 - t1) >>> That's a duration (or 'interval'). >>> >>> So "time" can be both 'a point in time' and a duration. >> >> No: a point in time is also a duration, but where the reference point >> (= the beginning of the interval) is assumed to be known already. > You _know_ that we in the western world specifies "points in time" > with the Gregorian calendar and the time zones based on UTC. Sure, but we could actually use all the other Popes, too, and could use their calendars, if we wished to do that. So: UTC is just one selection from a plethora of possibilities. > >>> >>> If we are only interested in durations, we may choose to >>> use a clock we can set to zero at any time. > > We are free to choose our time scale any way we want. > But it must be precisely defined, it is not 'given by nature'. > > Gregorian calendar and time zones based on UTC is > what 'everybody' uses in their everyday life. No, that is absolutely not true. We have actually several time systems in use today. Among the more important ones are the calendars of the Jews and the Muslims. > You use your wristwatch to meet at work at the right > 'point in time', don't you? Well, sometimes. Most of the time I use actually a different kind of clocks, which are based upon a timing signal, which gets broadcasted by some agency in Germany.> > But for scientific work, we will probably use other definitions of > our time. Sure, but not because our needs are higher, but because time has nothing to do with clocks. ... TH
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The problem of simultaneity Richard Hachel <rh@tiscali.fr> - 2025-10-01 00:46 +0000
Re: The problem of simultaneity Maciej Woźniak <mlwozniak@wp.pl> - 2025-10-01 07:06 +0200
Re: The problem of simultaneity Python <jpierre.messager@gmail.com> - 2025-10-01 07:44 +0000
Re: The problem of simultaneity Maciej Woźniak <mlwozniak@wp.pl> - 2025-10-01 11:07 +0200
Re: The problem of simultaneity Python <jpierre.messager@gmail.com> - 2025-10-01 09:45 +0000
Re: The problem of simultaneity Maciej Woźniak <mlwozniak@wp.pl> - 2025-10-01 13:02 +0200
Re: The problem of simultaneity Python <jpierre.messager@gmail.com> - 2025-10-01 11:31 +0000
Re: The problem of simultaneity Maciej Woźniak <mlwozniak@wp.pl> - 2025-10-01 13:37 +0200
Re: The problem of simultaneity Dan Wawrzaszek <kr@wskenezr.pl> - 2025-10-01 13:10 +0000
Re: The problem of simultaneity Richard Hachel <rh@tiscali.fr> - 2025-10-01 13:39 +0000
Re: The problem of simultaneity Maciej Woźniak <mlwozniak@wp.pl> - 2025-10-01 16:32 +0200
Re: The problem of simultaneity The Starmaker <starmaker@ix.netcom.com> - 2025-10-01 09:47 -0700
Re: The problem of simultaneity Thomas Heger <ttt_heg@web.de> - 2025-10-02 09:52 +0200
Re: The problem of simultaneity "Paul B. Andersen" <relativity@paulba.no> - 2025-10-04 20:39 +0200
Re: The problem of simultaneity Thomas Heger <ttt_heg@web.de> - 2025-10-05 11:00 +0200
Re: The problem of simultaneity "Paul B. Andersen" <relativity@paulba.no> - 2025-10-05 12:38 +0200
Re: The problem of simultaneity Maciej Woźniak <mlwozniak@wp.pl> - 2025-10-05 12:43 +0200
Re: The problem of simultaneity The Starmaker <starmaker@ix.netcom.com> - 2025-10-05 10:22 -0700
Re: The problem of simultaneity The Starmaker <starmaker@ix.netcom.com> - 2025-10-05 14:01 -0700
Re: The problem of simultaneity The Starmaker <starmaker@ix.netcom.com> - 2025-10-05 23:56 -0700
Re: The problem of simultaneity The Starmaker <starmaker@ix.netcom.com> - 2025-10-06 21:13 -0700
Re: The problem of simultaneity Thomas Heger <ttt_heg@web.de> - 2025-10-07 10:05 +0200
Re: The problem of simultaneity "Paul B. Andersen" <relativity@paulba.no> - 2025-10-07 10:51 +0200
Re: The problem of simultaneity The Starmaker <starmaker@ix.netcom.com> - 2025-10-07 14:37 -0700
Re: The problem of simultaneity Tommy Bagirov <yggoo@iooma.ru> - 2025-10-07 21:48 +0000
Re: The problem of simultaneity The Starmaker <starmaker@ix.netcom.com> - 2025-10-07 15:22 -0700
Re: The problem of simultaneity Shannon Bekovich-Cherkassky <sciaa@ssiivsoea.ru> - 2025-10-08 10:28 +0000
Re: The problem of simultaneity Richard Hachel <rh@tiscali.fr> - 2025-10-08 00:08 +0000
Re: The problem of simultaneity Fidencio Bagdasarov <ia@ddo.ru> - 2025-10-08 10:31 +0000
Re: The problem of simultaneity The Starmaker <starmaker@ix.netcom.com> - 2025-10-07 15:08 -0700
Re: The problem of simultaneity Thomas Heger <ttt_heg@web.de> - 2025-10-09 09:32 +0200
Re: The problem of simultaneity Python <jpierre.messager@gmail.com> - 2025-10-09 11:28 +0000
Re: The problem of simultaneity Thomas Heger <ttt_heg@web.de> - 2025-10-11 09:11 +0200
Re: The problem of simultaneity "Paul B. Andersen" <relativity@paulba.no> - 2025-10-09 14:08 +0200
Re: The problem of simultaneity Maciej Woźniak <mlwozniak@wp.pl> - 2025-10-09 16:21 +0200
Re: The problem of simultaneity Derric Bezumov <eebmm@dbdv.ru> - 2025-10-10 15:10 +0000
Re: The problem of simultaneity Darryn Belorusov <rodryo@nldulan.ru> - 2025-10-09 12:46 +0000
Re: The problem of simultaneity Maciej Woźniak <mlwozniak@wp.pl> - 2025-10-09 16:56 +0200
Re: The problem of simultaneity The Starmaker <starmaker@ix.netcom.com> - 2025-10-09 11:46 -0700
Re: The problem of simultaneity The Starmaker <starmaker@ix.netcom.com> - 2025-10-09 20:18 -0700
Re: The problem of simultaneity Huey Moshetov <uve@veeo.ru> - 2025-10-10 07:12 +0000
Re: The problem of simultaneity The Starmaker <starmaker@ix.netcom.com> - 2025-10-10 10:44 -0700
Re: The problem of simultaneity Maciej Woźniak <mlwozniak@wp.pl> - 2025-10-10 10:51 +0200
Re: The problem of simultaneity The Starmaker <starmaker@ix.netcom.com> - 2025-10-10 10:48 -0700
Re: The problem of simultaneity Thomas Heger <ttt_heg@web.de> - 2025-10-11 09:18 +0200
Re: The problem of simultaneity Richard Hachel <rh@tiscali.fr> - 2025-10-11 09:28 +0000
Re: The problem of simultaneity Thomas Heger <ttt_heg@web.de> - 2025-10-13 07:59 +0200
Re: The problem of simultaneity "Paul B. Andersen" <relativity@paulba.no> - 2025-10-13 21:59 +0200
Re: The problem of simultaneity Williard Romeijnders <jimso@dilidi.nl> - 2025-10-13 20:36 +0000
Re: The problem of simultaneity The Starmaker <starmaker@ix.netcom.com> - 2025-10-13 13:45 -0700
Re: The problem of simultaneity Maciej Woźniak <mlwozniak@wp.pl> - 2025-10-14 07:53 +0200
Re: The problem of simultaneity Thomas Heger <ttt_heg@web.de> - 2025-10-15 09:44 +0200
Re: The problem of simultaneity Maciej Woźniak <mlwozniak@wp.pl> - 2025-10-15 10:58 +0200
Re: The problem of simultaneity Dusty Wronski <yst@ok.pl> - 2025-10-15 10:26 +0000
Re: The problem of simultaneity Thomas Heger <ttt_heg@web.de> - 2025-10-16 06:22 +0200
Re: The problem of simultaneity "Paul B. Andersen" <relativity@paulba.no> - 2025-10-15 20:05 +0200
Re: The problem of simultaneity Maciej Woźniak <mlwozniak@wp.pl> - 2025-10-15 20:49 +0200
Re: The problem of simultaneity Python <jpierre.messager@gmail.com> - 2025-10-15 19:15 +0000
Re: The problem of simultaneity squalk <sq@net.inv> - 2025-10-15 20:44 +0100
Re: The problem of simultaneity The Starmaker <starmaker@ix.netcom.com> - 2025-10-15 13:19 -0700
Re: The problem of simultaneity Maciej Woźniak <mlwozniak@wp.pl> - 2025-10-16 08:14 +0200
Re: The problem of simultaneity Maciej Woźniak <mlwozniak@wp.pl> - 2025-10-16 08:16 +0200
Re: The problem of simultaneity Thomas Heger <ttt_heg@web.de> - 2025-10-16 07:02 +0200
Re: The problem of simultaneity The Starmaker <starmaker@ix.netcom.com> - 2025-10-16 00:44 -0700
Re: The problem of simultaneity "Paul B. Andersen" <relativity@paulba.no> - 2025-10-16 19:42 +0200
Re: The problem of simultaneity Richard Hachel <rh@tiscali.fr> - 2025-10-16 17:51 +0000
Re: The problem of simultaneity "Paul B. Andersen" <relativity@paulba.no> - 2025-10-18 11:39 +0200
Re: The problem of simultaneity "Paul B. Andersen" <relativity@paulba.no> - 2025-10-18 11:43 +0200
Re: The problem of simultaneity Maciej Woźniak <mlwozniak@wp.pl> - 2025-10-18 12:16 +0200
Re: The problem of simultaneity Maciej Woźniak <mlwozniak@wp.pl> - 2025-10-18 12:11 +0200
Re: The problem of simultaneity Richard Hachel <rh@tiscali.fr> - 2025-10-18 13:37 +0000
Re: The problem of simultaneity "Paul B. Andersen" <relativity@paulba.no> - 2025-10-18 19:52 +0200
Re: The problem of simultaneity "Paul B. Andersen" <relativity@paulba.no> - 2025-10-19 21:02 +0200
Re: The problem of simultaneity Maciej Woźniak <mlwozniak@wp.pl> - 2025-10-20 09:50 +0200
Re: The problem of simultaneity Richard Hachel <rh@tiscali.fr> - 2025-10-18 13:39 +0000
Re: The problem of simultaneity Richard Hachel <rh@tiscali.fr> - 2025-10-18 13:40 +0000
Re: The problem of simultaneity Python <jpierre.messager@gmail.com> - 2025-10-18 13:52 +0000
Re: The problem of simultaneity Zackee Barazbiev <vbez@eaek.ru> - 2025-10-18 13:50 +0000
Re: The problem of simultaneity Maciej Woźniak <mlwozniak@wp.pl> - 2025-10-16 21:11 +0200
Re: The problem of simultaneity Mikko <mikko.levanto@iki.fi> - 2025-10-14 13:11 +0300
Re: The problem of simultaneity Maciej Woźniak <mlwozniak@wp.pl> - 2025-10-14 12:39 +0200
Re: The problem of simultaneity Thomas Heger <ttt_heg@web.de> - 2025-10-15 09:54 +0200
Re: The problem of simultaneity Maciej Woźniak <mlwozniak@wp.pl> - 2025-10-15 10:59 +0200
Re: The problem of simultaneity Mikko <mikko.levanto@iki.fi> - 2025-10-15 12:32 +0300
Re: The problem of simultaneity Thomas Heger <ttt_heg@web.de> - 2025-10-16 06:39 +0200
Re: The problem of simultaneity Mikko <mikko.levanto@iki.fi> - 2025-10-16 12:53 +0300
Re: The problem of simultaneity The Starmaker <starmaker@ix.netcom.com> - 2025-10-15 08:26 -0700
Re: The problem of simultaneity Thomas Heger <ttt_heg@web.de> - 2025-10-16 06:53 +0200
Re: The problem of simultaneity The Starmaker <starmaker@ix.netcom.com> - 2025-10-16 00:41 -0700
Re: The problem of simultaneity "Paul B. Andersen" <relativity@paulba.no> - 2025-10-15 20:05 +0200
Re: The problem of simultaneity Maciej Woźniak <mlwozniak@wp.pl> - 2025-10-15 20:37 +0200
Re: The problem of simultaneity Python <jpierre.messager@gmail.com> - 2025-10-15 19:14 +0000
Re: The problem of simultaneity Maciej Woźniak <mlwozniak@wp.pl> - 2025-10-16 08:04 +0200
Re: The problem of simultaneity Python <jpierre.messager@gmail.com> - 2025-10-17 00:19 +0000
Re: The problem of simultaneity Maciej Woźniak <mlwozniak@wp.pl> - 2025-10-17 07:36 +0200
Re: The problem of simultaneity The Starmaker <starmaker@ix.netcom.com> - 2025-10-15 11:51 -0700
Re: The problem of simultaneity Maykel Schneijder <eaa@eleeadmia.nl> - 2025-10-15 18:59 +0000
Re: The problem of simultaneity "Paul B. Andersen" <relativity@paulba.no> - 2025-10-11 21:43 +0200
Re: The problem of simultaneity Mikko <mikko.levanto@iki.fi> - 2025-10-12 13:03 +0300
Re: The problem of simultaneity Maciej Woźniak <mlwozniak@wp.pl> - 2025-10-12 12:33 +0200
Re: The problem of simultaneity Dennett Poplawski <swpt@ltoea.pl> - 2025-10-12 10:53 +0000
Re: The problem of simultaneity "Paul B. Andersen" <relativity@paulba.no> - 2025-10-12 21:13 +0200
Re: The problem of simultaneity Elier Szczepanski <eee@spi.pl> - 2025-10-12 19:50 +0000
Re: The problem of simultaneity Thomas Heger <ttt_heg@web.de> - 2025-10-13 08:31 +0200
Re: The problem of simultaneity The Starmaker <starmaker@ix.netcom.com> - 2025-10-13 00:03 -0700
Re: The problem of simultaneity "Paul B. Andersen" <relativity@paulba.no> - 2025-10-13 22:00 +0200
Re: The problem of simultaneity The Starmaker <starmaker@ix.netcom.com> - 2025-10-13 13:54 -0700
Re: The problem of simultaneity Thomas Heger <ttt_heg@web.de> - 2025-10-02 09:20 +0200
Re: The problem of simultaneity "Paul B. Andersen" <relativity@paulba.no> - 2025-10-04 21:00 +0200
Re: The problem of simultaneity Thomas Heger <ttt_heg@web.de> - 2025-10-05 11:16 +0200
Re: The problem of simultaneity "Paul B. Andersen" <relativity@paulba.no> - 2025-10-05 13:51 +0200
Re: The problem of simultaneity Thomas Heger <ttt_heg@web.de> - 2025-10-07 10:31 +0200
Re: The problem of simultaneity "Paul B. Andersen" <relativity@paulba.no> - 2025-10-08 21:58 +0200
Re: The problem of simultaneity Python <jpierre.messager@gmail.com> - 2025-10-01 07:45 +0000
Re: The problem of simultaneity wugi <wugi@brol.invalid> - 2025-10-13 10:19 -0300
Re: The problem of simultaneity Maciej Woźniak <mlwozniak@wp.pl> - 2025-10-13 15:43 +0200
Re: The problem of simultaneity Richard Hachel <rh@tiscali.fr> - 2025-10-13 13:47 +0000
Re: The problem of simultaneity Jay Wojewódzki <jeazwak@kj.pl> - 2025-10-13 16:55 +0000
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