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   sci.physics.relativity      The theory of relativity      225,861 messages   

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   Message 223,935 of 225,861   
   The Starmaker to All   
   Re: The problem of simultaneity   
   13 Oct 25 00:03:03   
   
   From: starmaker@ix.netcom.com   
      
   On Mon, 13 Oct 2025 08:31:00 +0200, Thomas Heger    
   wrote:   
      
   >Am Samstag000011, 11.10.2025 um 21:43 schrieb Paul B. Andersen:   
   >> Den 11.10.2025 09:18, skrev Thomas Heger:   
   >>> Am Donnerstag000009, 09.10.2025 um 20:46 schrieb The Starmaker:   
   >>> ...   
   >>>>   
   >>>> It is not an assumption. Einstein's time is only based on...'local   
   >>>> only'...it's caled...Relativity.   
   >>   
   >>> No, beause Einstein used (secretly) an absolute time and an absolute   
   >>> space in SRT.   
      
   Whether Einstein uses an absolute time or a local time, both Times are   
   based on a observer and the position of the observer...which makes it   
   local time both times...and both times are relative.   
      
      
      
      
   >>   
   >> Consider the following scenario:   
   >> Given an Euclidean space where the axes are called x, y and z.   
   >> A is a point at x = 0, y = 0 and z = 0.   
   >> B is a point at x = L, y = 0 and z = 0.   
   >> Clock Ca is placed at A and another, equal clock Cb is at B.   
   >> The two clocks simultaneously show the same; they are synchronous.   
   >> An object is moving at constant speed from A to B.   
   >> When the object is at A clock Ca shows t = ta.   
   >> When the object is at B clock Cb shows t = tb.   
   >>   
   >> The time the object used to travel from A to B is ?t = tb - ta.   
   >> The object was moving at the speed v = L/?t = L/(tb - ta).   
   >>   
   >> Note that the above is equally true according Newtonian Mechanics   
   >> and according to The Special Theory of Relativity (SRT).   
   >   
   >   
   >The clock at point 'A' should show 'A-time', which is the local time at   
   >point A.   
   >   
   >Same with point B and 'B-time'.   
   >   
   >But those time measures are local to A and B (and do not necessary run   
   >into the same direction at all possible points).   
   >   
   >That remote location uses the same time, which runs into the same   
   >direction and makes clocks tick at the same rate, that is an assumption.   
   >   
   >But this assumption also means, that all clocks in all the universe   
   >would run into the same direction and make clocks tick at the same rate.   
   >   
   >THAT is actually 'Newton's absolute time', which is 'external' (kind of   
   >'God's clock').   
   >   
   >But if time isn't external, then time had to be restricted to the   
   >location in question.   
   >   
   >This would allow the observer at point 'A' (for instance) to declare   
   >himself to be at rest and everything else as moving.   
   >   
   >But that observer would need to consider, that all other observers could   
   >do the same, but with other time-measures.   
   >   
   >>   
   >>> The use of Euclidean space in SRT defines also time as absolute measure.   
   >>>   
   >>> this is so because Euclidean space is meant as 'timeless'.   
   >>   
   >> Why does the fact that there is no 'time' in the metric   
   >> ds² = dx² + dY² + dz² imply that the time ?t is 'absolute'?   
   >   
   >Not delta(t), of course, but time t itself.   
   >   
   >Without some 'absolute time t' you could hardly use delta(t), because   
   >that wouldn't make sense, if you have no time t to beginn with.   
   >   
   >   
   >> What does it mean that the time ?t is defined "as absolute measure"?   
   >   
   >>>   
   >>> This 'timeless' means, that time and geometry are treated as   
   >>> fundamentally distict entities.   
   >>   
   >> Of course time and space are fundamentally distinct entities.   
   >   
   >   
   >Not just because you say so!   
   >   
   >I wanted to show, that a spacetime diagram could be treated as complex   
   >valued plain.   
   >   
   >Then time would become imaginary and the real axes real.   
   >   
   >Now we could take the axis of time and rotate it (in our mind only, of   
   >course).   
   >   
   >Then another axis would become the new axis of time with new orthogonal   
   >real axes of a space, which is also filled with new matter.   
   >   
   >Even if the concept is mathematically very simple, it is totally   
   >counter-intuitive.   
   >   
   >BUT: the real world we live in looks like precisely following such a   
   >principle.   
   >   
   >In case you don't understand the idea, you could read my 'book', which   
   >can be found here:   
   >   
   >https://docs.google.com/presentation/d/1Ur3_giuk2l439fxUa8QHX4w   
   DxBEaM6lOlgVUa0cFU4/edit?usp=sharing   
   >   
   >...   
   >   
   >   
   >TH   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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