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From: Mikko <mikko.levanto@iki.fi>
Newsgroups: sci.physics.relativity
Subject: Re: Sync two clocks
Date: Sun, 25 Aug 2024 13:15:37 +0300
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On 2024-08-25 07:07:58 +0000, Thomas Heger said:

> Am Samstag000024, 24.08.2024 um 12:09 schrieb Paul.B.Andersen:
> 
>>> 
>>> Here is yet another proof of what I am saying, and of the need to 
>>> re-explain things correctly.
>> 
>> Do you mean that the fact that Tomas Heger doesn't know what
>> "invariant" means, is a proof of the need to re-explain
>> my statement correctly?
>> 
>> My statement was:
>> " Richard, read your watch NOW. Write down the time nn:nn:nn.
>>   The time nn:nn:nn is a proper time (read off a clock), it is
>>   invariant, not depending on frame of reference.
>>   Nobody can have another opinion of what time YOU read of YOUR watch."
>> 
>> Both "proper time" and "invariant" are explained in the text.
>> 
> A piece of paper containing some time value has nothing to do with 
> time, let alone 'proper time', because the value written gets 
> immediatly out of synch with the clock, from which that value was 
> copied.

It is the proper time of the watch at the event of reading it. Nobody
claimed it be useful, just that it is invariont.

-- 
Mikko