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From: Thomas Heger <ttt_heg@web.de>
Newsgroups: sci.physics.relativity
Subject: =?UTF-8?Q?Re=3A_Le_pi=C3=A8ge_parfait_=28the_perfect_trap=29?=
Date: Fri, 19 Jul 2024 12:16:06 +0200
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Am Donnerstag000018, 18.07.2024 um 19:54 schrieb Paul.B.Andersen:
> Den 18.07.2024 08:40, skrev Thomas Heger:
>> Am Mittwoch000017, 17.07.2024 um 14:34 schrieb Paul.B.Andersen:
>>>
>>> The Special Theory of Relativity is precisely defined,
>>> and there is no debate of what it is.
>>> (Among reasonable knowledgeable people.)
>>>
>>
>> You could regard as 'SRT' also the modern version(-s) of Einstein's 
>> origional theory.
>>
>> This would be the relations in 'flat' space, where objects fly in 
>> streigth lateral motion and non-accelerated objects.
> 
> 
> The one and only Special Theory of Relativity is only
> valid in "flat spacetime" where there is no gravitation.
> 
> In flat spacetime non accelerated objects will move along
> straight lines in an inertial frame of reference.
> But accelerated objects can move in along any curve depending
> on the accelerating force. Obviously!
> 
> Examples of accelerated motion in flat spacetime:
> https://paulba.no/pdf/TwinsByMetric.pdf
> 
>> I would regard this interpretation of 'SRT' as perfectly possible, too.
> 
> There is no interpretation of SR where objects can't accelerate.


Sure, but 'On the electrodynamics of moving bodies' did not cover 
acceleration.

('acceleration' occured only in connection with electrons)

This went as far as this:

Einstein wrote, that because something is valid for movement along a 
streight line, it must be valid for any polygonal line, too.


But that was nonsense (actually funny nonsense), because that 
'something' was streigth lateral motion with constant velocity.

Now it is not possible at all, to move with constant velocity along a 
polygonal line, because that would cause infinite acceleration in the 
corners.


....

TH