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Re: Universal anisochronism

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Le 30/09/2025 à 15:47, Maciej Woźniak a écrit :
> On 9/30/2025 3:02 PM, Mikko wrote:
>> On 2025-09-29 14:18:17 +0000, Richard Hachel said:
>> 
>>> Le 29/09/2025 à 11:43, Mikko a écrit :
>>>> On 2025-09-28 11:19:34 +0000, Richard Hachel said:
>>>>
>>>>> The problem of synchronization.
>>>>> Is it possible to synchronize multiple clocks located in different 
>>>>> positions within an inertial frame of reference?
>>>>
>>>> Yes, if the clocks are stationary with respect to that frame and 
>>>> there is
>>>> no significant gravity.
>>>>
>>>>> In Newtonian physics, yes, because space and time are considered 
>>>>> independent entities.
>>>>
>>>> In a Newtonian world you can synchornize two clocks in the same place,
>>>> and they stay syncronized when moved to different places. In the real
>>>> world moving them will desynchronize them.
>>>>
>>>>> In relativistic physics, this is no longer possible, since each 
>>>>> clock has its own concept of universal simultaneity, specific to its 
>>>>> own frame of reference.
>>>>
>>>> By the usual concept of simultaneity is not clock specific, only frame
>>>> specific. If you have a coordinate system with a time coordinate then
>>>> you can define that clocks showing the coordinate time are synchronous.
>>>>
>>>>> Let's send a signal from point M, the midpoint of AB, to points A 
>>>>> and B.  It is clear that for M, regardless of the time at which it 
>>>>> assumes the signal was received by the two other points, the two 
>>>>> events tA and tB would have been simultaneous. M doesn't know "when" 
>>>>> they occurred, but it knows "that they were, by definition, 
>>>>> simultaneous FOR IT, since the distances MA and MB are equal."
>>>>
>>>> That requires that the speed of the signals to A and to B have the same
>>>> speed.
>>>>
>>>>> However, in relativistic physics, for observer A, the two events are 
>>>>> not simultaneous, nor are they for observer B.
>>>>
>>>> They are if simultaneity is defined with those signals.
>>>
>>> What we really need to understand is the fundamental principle of the 
>>> theory of relativity, without which we can still say things, but with 
>>> very little understanding of what we're actually talking about.
>> 
>> Fortunately the Minkowski geometry is easy to understand, and after that
>> the special relativity isn't much harder.
> 
> And still the mumble of the idiot was not even consistent.

Minimal dementia from Maciej today. Nurses will have a nice evening.

 

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Universal anisochronism Richard Hachel <rh@tiscali.fr> - 2025-09-28 11:19 +0000
  Re: Universal anisochronism Harold Babosov <sava@ob.ru> - 2025-09-28 12:56 +0000
    Re: Universal anisochronism Richard Hachel <rh@tiscali.fr> - 2025-09-28 13:12 +0000
      Re: Universal anisochronism The Starmaker <starmaker@ix.netcom.com> - 2025-09-28 16:36 -0700
        Re: Universal anisochronism "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2025-09-28 17:14 -0700
  Re: Universal anisochronism The Starmaker <starmaker@ix.netcom.com> - 2025-09-28 10:23 -0700
    Re: Universal anisochronism The Starmaker <starmaker@ix.netcom.com> - 2025-09-28 10:32 -0700
      Re: Universal anisochronism The Starmaker <starmaker@ix.netcom.com> - 2025-09-29 16:11 -0700
        Re: Universal anisochronism The Starmaker <starmaker@ix.netcom.com> - 2025-09-30 00:41 -0700
        Re: Universal anisochronism Tristan Wibberley <tristan.wibberley+netnews2@alumni.manchester.ac.uk> - 2025-10-15 11:03 +0100
  Re: Universal anisochronism Mikko <mikko.levanto@iki.fi> - 2025-09-29 12:43 +0300
    Re: Universal anisochronism Richard Hachel <rh@tiscali.fr> - 2025-09-29 14:18 +0000
      Re: Universal anisochronism The Starmaker <starmaker@ix.netcom.com> - 2025-09-29 08:46 -0700
      Re: Universal anisochronism Python <jpierre.messager@gmail.com> - 2025-09-29 15:52 +0000
        Re: Universal anisochronism Richard Hachel <rh@tiscali.fr> - 2025-09-29 19:19 +0000
          Re: Universal anisochronism Python <jpierre.messager@gmail.com> - 2025-09-29 21:35 +0000
      Re: Universal anisochronism Mikko <mikko.levanto@iki.fi> - 2025-09-30 16:02 +0300
        Re: Universal anisochronism Richard Hachel <rh@tiscali.fr> - 2025-09-30 13:37 +0000
          Re: Universal anisochronism Mikko <mikko.levanto@iki.fi> - 2025-10-01 13:22 +0300
        Re: Universal anisochronism Maciej Woźniak <mlwozniak@wp.pl> - 2025-09-30 15:47 +0200
          Re: Universal anisochronism Python <jpierre.messager@gmail.com> - 2025-09-30 14:00 +0000
            Re: Universal anisochronism Maciej Woźniak <mlwozniak@wp.pl> - 2025-09-30 16:10 +0200
              Re: Universal anisochronism Python <jpierre.messager@gmail.com> - 2025-09-30 14:22 +0000
                Re: Universal anisochronism Maciej Woźniak <mlwozniak@wp.pl> - 2025-09-30 16:31 +0200
                Re: Universal anisochronism Python <jpierre.messager@gmail.com> - 2025-09-30 14:39 +0000
                Re: Universal anisochronism Maciej Woźniak <mlwozniak@wp.pl> - 2025-09-30 16:50 +0200
                Re: Universal anisochronism Python <jpierre.messager@gmail.com> - 2025-09-30 14:52 +0000
                Re: Universal anisochronism Maciej Woźniak <mlwozniak@wp.pl> - 2025-09-30 17:10 +0200
                Re: Universal anisochronism Python <jpierre.messager@gmail.com> - 2025-09-30 15:18 +0000
                Re: Universal anisochronism Maciej Woźniak <mlwozniak@wp.pl> - 2025-09-30 17:47 +0200
                Re: Universal anisochronism Python <jpierre.messager@gmail.com> - 2025-09-30 16:24 +0000
                Re: Universal anisochronism Oleander Sadowski <nadre@ilasa.pl> - 2025-09-30 22:02 +0000
  Re: Universal anisochronism Python <jpierre.messager@gmail.com> - 2025-09-29 13:29 +0000
    Re: Universal anisochronism Maciej Woźniak <mlwozniak@wp.pl> - 2025-09-29 15:50 +0200
  Re: Universal anisochronism Thomas Heger <ttt_heg@web.de> - 2025-10-02 08:46 +0200
    Re: Universal anisochronism Richard Hachel <rh@tiscali.fr> - 2025-10-02 10:31 +0000

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