RELATIVITY WITHOUT EINSTEIN LIGHT POSTULATE

On Aug 16, 9:38 am, Pentcho Valev wrote:
On 16 Aug, 15:48, xray4abc wrote:





On Aug 16, 2:20 am, Pentcho Valev wrote:

On 16 Aug, 04:55, xray4abc wrote:

Hi
I took a look at the mentioned paper.
So,..... let's get rid of the second postulate and
use a mathematical supposition (based on God's whisper ?)
instead !

You need not do so. The second postulate:

http://www.fourmilab.ch/etexts/einstein/specrel/www/"...light is
always propagated in empty space with a definite velocity c which is
independent of the state of motion of the emitting body."

is false and you should get rid of it indeed but then you could use
its negation instead:

Light is always propagated in empty space with a speed which is
dependent on the state of motion of the emitting body and obeys the
equation c'=c+v, where c is the initial speed of photons relative to
the emitting body and v is the relative speed of the emitting body and
the observer. In the presence of a gravitational field and if the
emitting body and the observer are at rest relative to one another,
the speed of light obeys the equation c'=c(1+V/c^2), where V is the
gravitational potential difference between the point of emission and
the point of measurement.

Pentcho Valev

The main question here is:
Is there a SAME LIMITED speed
for information/action transmission in all IRFs?

There can be no such "main question". Either Einstein's light
postulate

http://www.fourmilab.ch/etexts/einstein/specrel/www/"...light is
always propagated in empty space with a definite velocity c which is
independent of the state of motion of the emitting body."

is true and then special relativity is correct, or Einstein's light
postulate is false and then, as Einstein himself puts it, "nothing
will remain of my whole castle in the air, including the theory of
gravitation, but also nothing of the rest of contemporary physics".
Nature has already taken the decision concerning the truth or
falsehood of the light postulate; our task is to inform the world
about that decision. That is the "main question".

Pentcho Valev- Hide quoted text -

- Show quoted text -

I would say, almost ANY theory could be true, choosing
carefully the domain for its validity.
SRT is valid in its domain, like any other theory.
Now, discussions could be about:
- what exactly this domain is
- the meaning of its relations
- ... you name it !
Personally, I think that there are
serious misconceptions
in the interpretation of concepts, e.g.
"time dilation", "length contraction" ,relativity
of simultaneity, ....etc.
In Einstein's SRT , c is the same constant speed
of light propagation in all IRFs.
IF you are saying that c is different in
different IRFs, that could be (let say !) OK, but
THEN IT IS NOT Einstein's SRT (known as THE SRT)
but it is YOUR SRT.
Of course, you still will have to show,
how YOUR theory can merge
the rest of physics theories.
Good luck!
Regards, LL