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From: Thomas Heger <ttt_heg@web.de>
Newsgroups: sci.physics.relativity
Subject: Re: [SR and synchronization] Cognitive Dissonances and Mental
 Blockage
Date: Mon, 19 Aug 2024 08:44:07 +0200
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Am Sonntag000018, 18.08.2024 um 12:05 schrieb Python:

>>> Two identical clocks, A and B, are stationary relative to each other 
>>> at a certain distance. Their identical functioning (within 
>>> measurement accuracy) allows us to assume that they "tick at the same 
>>> rate." NOTHING more is assumed, especially regarding the time they 
>>> display; the purpose is PRECISELY to adjust one of these clocks by 
>>> applying a correction after a calculation involving the values 
>>> indicated on these clocks during specific events, events that occur 
>>> AT THE LOCATION OF EACH CLOCK.
>>>
>>> Einstein’s procedure is not strictly a synchronization procedure but 
>>> a method to VERIFY their synchronization. This is the main difference 
>>> from Poincaré’s approach. However, it can be proven that Poincaré’s 
>>> method leads to clocks synchronized in Einstein’s sense. You can also 
>>> transform Einstein’s verification method into a synchronization 
>>> procedure because it allows calculating the correction to apply to 
>>> clock A.
>>>
>>> *Steps of Einstein's Method:*
>>>
>>> When clock A shows t_A, a light signal is emitted from A towards B.
>>>
>>> When this signal is received at B, clock B shows t_B, and a light 
>>> signal is sent from B back towards A.
>>>
>>> When the signal is received at A, clock A shows t'_A.
>>

>> Relativity requires mutally symmetric methods. So if you synchronize 
>> clock B with clock A, this must come to the same result, as if you 
>> would synchronize clock A with clock B.
> 
> It is.

No, it is not!

Einstein's method did not allow mutally symmetric synchronization.

Einstein's method would cause an error, because if you do not add the 
time of travel for the signal, you would turn the own clock to a time 
too early, if you synchronize it with a received timing signal.

This 'too early' would change the setting of your clock to a time too 
early. This is seen from the far side, where the observers there try to 
synchronize their clocks with your clock, which is already to early, but 
with additional (uncompensated) delay.

This would make the whole installation run in a backwards circle.

This is way too obvious to ignore, but not what Einstein had done or 
written.



> 
>> But this requirement was not fullfilled in Einstein's scheme, because 
>> Einstein didn't take delay into consideration.
> 
> The delay *is taken into account* this why (AB)/c intervene, as I've
> shown.

The word 'delay' or anything similar did not occur in Einstein's text.

There is also no equation, which could eventually be interpreted as 
delay calculation.

Delay for a signal from A->B in distance x would be:

x=c*t => delay (A->B)= x/c

Extremely simple, isn't it?

Now you need to measure this delay, because you cannot measure distance 
x with rods (at least in cosmology).

But where have you found such a calculation in Einstein's text???

And where have you found any use of the value for delay?

I personally have searched for it but couldn't find that.

This leaves only one interpretation: that Einstein didn't want to take 
delay into considerations.

This would fit to his obscure method, which assignes different time 
values to remote locations in different distances, but within the same 
coordinate system.



....


TH