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Groups > sci.physics.relativity > #660939
| From | Thomas Heger <ttt_heg@web.de> |
|---|---|
| Newsgroups | sci.physics.relativity |
| Subject | Re: Division by zero |
| Date | 2025-02-02 07:58 +0100 |
| Message-ID | <m08jceFtovhU2@mid.individual.net> (permalink) |
| References | <m063e7FhjrnU1@mid.individual.net> <vnkpup$1f33$1@dont-email.me> <ZJqcnTeaXaCASwP6nZ2dnZfqn_ednZ2d@giganews.com> |
Am Sonntag000002, 02.02.2025 um 03:19 schrieb Ross Finlayson: > On 02/01/2025 01:36 AM, Mikko wrote: >> On 2025-02-01 08:14:08 +0000, Thomas Heger said: >> >>> Hi NG >>> >>> I'm actually not really certain, but found an error in Einstein's 'On >>> the electrodynamics of moving bodies' which is quite serious. >>> >>> >>> See page six, roughly in the middle: >>> >>> There we find an equation, which says this: >>> >>> ∂τ/∂y= 0 >> >> Do you mean on page 899 (9th page of the article) in §3? >> The operation is not division but a partial derivative. >> >>> Now, 'tau' is a time belonging to the moving system k. >> >> Yes, but it is also a number that is computed from coordinates of K. >> >>> This system k moves along the x-axis of system K with velocity v, >>> while x- and xsi-axis coincide and etha- and y axis remain parallel. >>> >>> In other words v_y is permanently zero, >> >> Yes, >> >>> or: ∂y=0. >> >> No. ∂y is not a number but a part of an operator. There are points with >> different values of y and ∂/∂y refers to a line where t, x, and z (but >> not >> y) have the same value at every point. >> >> See https://en.wikipedia.org/wiki/Partial_derivative >> > > Zero meters/second is infinity seconds/meter. > yes, but that was my complain! If there is not movement along the y-axis, then time tau would pass, but y would remain zero. This would mean, that ∂τ/∂y= infinity (and NOT zero).
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Division by zero Thomas Heger <ttt_heg@web.de> - 2025-02-01 09:14 +0100
Re: Division by zero Mikko <mikko.levanto@iki.fi> - 2025-02-01 11:36 +0200
Re: Division by zero Ross Finlayson <ross.a.finlayson@gmail.com> - 2025-02-01 18:19 -0800
Re: Division by zero Thomas Heger <ttt_heg@web.de> - 2025-02-02 07:58 +0100
Re: Division by zero Mikko <mikko.levanto@iki.fi> - 2025-02-02 11:40 +0200
Re: Division by zero "Paul.B.Andersen" <relativity@paulba.no> - 2025-02-03 12:27 +0100
Re: Division by zero (0, 1, infinity) Ross Finlayson <ross.a.finlayson@gmail.com> - 2025-02-02 07:45 -0800
Re: Division by zero Thomas Heger <ttt_heg@web.de> - 2025-02-02 07:52 +0100
Re: Division by zero Thomas Heger <ttt_heg@web.de> - 2025-02-02 09:26 +0100
Re: Division by zero Mikko <mikko.levanto@iki.fi> - 2025-02-02 11:38 +0200
Re: Division by zero Thomas Heger <ttt_heg@web.de> - 2025-02-03 09:14 +0100
Re: Division by zero Mikko <mikko.levanto@iki.fi> - 2025-02-03 17:20 +0200
Re: Division by zero Thomas Heger <ttt_heg@web.de> - 2025-02-04 08:16 +0100
Re: Division by zero Mikko <mikko.levanto@iki.fi> - 2025-02-05 09:48 +0200
Re: Division by zero Thomas Heger <ttt_heg@web.de> - 2025-02-05 10:09 +0100
Re: Division by zero Mikko <mikko.levanto@iki.fi> - 2025-02-02 11:30 +0200
Re: Division by zero Thomas Heger <ttt_heg@web.de> - 2025-02-03 08:56 +0100
Re: Division by zero Athel Cornish-Bowden <me@yahoo.com> - 2025-02-03 10:02 +0100
Re: Division by zero Thomas Heger <ttt_heg@web.de> - 2025-02-03 11:17 +0100
Re: Division by zero Thomas Heger <ttt_heg@web.de> - 2025-02-03 11:17 +0100
Re: Division by zero Mikko <mikko.levanto@iki.fi> - 2025-02-03 17:51 +0200
Re: Division by zero Maciej Wozniak <mlwozniak@wp.pl> - 2025-02-03 17:33 +0100
Re: Division by zero Thomas Heger <ttt_heg@web.de> - 2025-02-04 08:36 +0100
Re: Division by zero Mikko <mikko.levanto@iki.fi> - 2025-02-04 11:13 +0200
Re: Division by zero Maciej Wozniak <mlwozniak@wp.pl> - 2025-02-04 11:58 +0100
Re: Division by zero Thomas Heger <ttt_heg@web.de> - 2025-02-05 09:32 +0100
Re: Division by zero nospam@de-ster.demon.nl (J. J. Lodder) - 2025-02-01 23:28 +0100
Re: Division by zero Ross Finlayson <ross.a.finlayson@gmail.com> - 2025-02-01 20:26 -0800
Re: Division by zero film.art@gmail.com (JanPB) - 2025-02-20 21:45 +0000
Re: Division by zero The Starmaker <starmaker@ix.netcom.com> - 2025-02-20 21:18 -0800
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