Re: SR's velocity addition -- ANY Experimental Evidence?

From: Androcles (androc1es_at_nospamblueyonder.co.uk)
Date: 07/20/04 

Date: Tue, 20 Jul 2004 15:01:28 GMT

"Timo Nieminen" <timo@physics.uq.edu.au> wrote in message
news:Pine.LNX.4.50.0407201241480.9287-100000@localhost...
| On Tue, 20 Jul 2004, Spaceman wrote:
|
| > "Timo Nieminen" <timo@physics.uq.edu.au> wrote:
| > } (2) The quantity s12^2 = c^2 (t1 - t2)^2 - |r1 - r2|^2 is the same in
all
| > } inertial coordinate systems
| >
| > Can you give reasons for each number?
|
| The postulates are chosen so that predicted measurements agree with
| experimental measurements.
|
| > What physical "things" or measurements of things, are these numbers
representing?
|
| Time and position vectors of events 1 and 2.

Time is not a vector, it has no inverse. You can return from where you were
by travelling a distance 1 mile and returning a distance of -1 mile. When
you are able to return to when you were by waiting one second and then
unwaiting -1 second then you can call time a vector, and not before.

|
| Psst! The derivation will make use of matrices, linear transformations,
| and groups. You're not going to like it!
|
Psst... If you think time is a vector, you are not going to make it.
Androcles.
| --
| Timo Nieminen

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