Re: lorenz transformation and spped of light

On Sep 20, 9:18 am, "JM Albuquerque" <jmDO...@xxxxxxx> wrote:
"Jeckyl" <no...@xxxxxxxxxxx> escreveu na mensagemnews:13f3hjam48l0218@xxxxxxxxxxxxxxxxxxxxx

"Chrisd5000rouge" <christian.d...@xxxxxxxxxxx> escreveu na mensagem
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Two spacecrafts running at opposite directions at 0.8c each, the
lorenz transformation says that their relative speed perception is u=
(0.8c+0.8c)/(1+(0.8c*0.8c/c²))= 0.975c.

It not a "perception" .. it IS their relative speed (ie the speed of the
second spaceship in the iFoR of the first). SR doesn't talk about optical
illusions :)

That's completely nonsense.

Of course it's a perception, since the problem starts saying:
Two spacecrafts running at opposite directions at 0.8c each.
Why cannot the reality be that of two spacecrafts running at
opposite directions at 0.8c each?

We build two spacecrafts, we place then back-to-back,
and we fire them with a program that guarantees that in
a given time and a given distance, both will be running
at 0.8c.

So we know what the reality is.


That's what it is in one frame of reference. What you apparently
assume, but haven't convincingly argued is:
- that if they have a relative velocity of 1.6 c in one frame of
reference, then this must be the relative velocity in any other frame
of reference;
and/or
- this is the frame of reference that determines what *reality* is,
and if other frames of reference do not result in the same number,
then those cannot be ascribed to *reality*.

PD

.

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