Albert Einstein, “What Is The Theory Of Relativity?” (November 28, 1919)

In the London Times, Einstein explained this fact about his theory:

"The second principle, on which the special theory of relativity rests,
is the "principle of the constant velocity of light in vacuo." This
principle asserts that light in vacuo always has a definite velocity of propagation (independent of the state of motion of the observer or of
the source of the light). The confidence which physicists place in this principle springs from the successes achieved by the electrodynamics of
Maxwell and Lorentz."

The velocity of waves does not include the velocity of the source
because compression waves are formed, constraining the speed to that
dictated by the medium.

The velocity of both particles and waves includes that of the observer.

To deny that light velocity involves that of the observer is stupid,
illogical, and irrational nonsense. It is a denial of relative motion
itself.

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Le 01/01/2025 à 21:06, clzb93ynxj@att.net (LaurenceClarkCrossen) a écrit
:

Albert Einstein, “What Is The Theory Of Relativity?” (November 28, 1919)

In the London Times, Einstein explained this fact about his theory:

"The second principle, on which the special theory of relativity rests,
is the "principle of the constant velocity of light in vacuo." This
principle asserts that light in vacuo always has a definite velocity of propagation (independent of the state of motion of the observer or of
the source of the light). The confidence which physicists place in this principle springs from the successes achieved by the electrodynamics of Maxwell and Lorentz."

The velocity of waves does not include the velocity of the source
because compression waves are formed, constraining the speed to that
dictated by the medium.

The velocity of both particles and waves includes that of the observer.

To deny that light velocity involves that of the observer is stupid, illogical, and irrational nonsense. It is a denial of relative motion
itself.

I see that you still do not understand the theory of relativity.
This is very unfortunate, and I feel like I am unfortunately speaking into
the void.
The second postulate of Poincaré (and not of Einstein who NEVER
postulated anything at all except copied the work of others) proposes
something A PRIORI.
It is a postulate.
It postulates that the speed of light in a vacuum is invariant by change
of reference frame, which poses a double problem.
It is both true and false physically, and, secondly, it is a postulate and
a postulate does not say why.

We do not have this double problem with Dr. Hachel.

In Hachel, who is very mean, not only is the postulate obviously derived
from another postulate that explains WHY (the notion of universal
anisochrony and the relativity of hyperplanes of simultaneity in the same stationary frame of reference) but moreover,
it explains that it is the transverse speed of light that is invariant,
and equal to c in all frames of reference.

I remind you, breathe, blow, do not feel unwell, that each observer, in
Hachel, observes his universe live. It then becomes obvious that a light
ray is instantly perceived by any receiver (it could be my retina), and
that this speed (infinite) remains so by change of frame of reference (it
is me who moves), or whatever the speed of the source.

On the other hand, if a photon flees me, I would always see it flee in the
same way, and at the same speed (Vapp=c/2).

And this in whatever frame of reference I am in.

Which means that the transverse speed of a photon will always be equal to
c, whatever frame of reference I am in (even if I am in a uniformly
accelerated frame of reference).

The transverse speed of light will become a physical invariant.

So there is some truth and some falsehood in what physicists say.

They do not say that we observe the universe live, and believe that this
galaxy which is 13 billion light years away (notion of distance) existed thirteen billion years ago (notion of time).

They do not understand that 13 billion years is a value given by a
geometric position of a distant observer who would observe the path of the photon transversely, but that it has nothing to do with my retinal
hyperplane of simultaneity.

They are absolutely incapable of passing Cape Hachel, and again, they
passed Cape Poincaré with some difficulty (they understand the notion of relativity of the internal chronotropy of watches) but, and this is for me
an extraordinary phenomenon, even miraculous, the notion of anisochrony
and correct spatio-temporal geometry.

They remain stuck in a completely abstract and mathematically stupid Minkowskian block, and are incapable of seeing further.

This has always amazed me.

R.H.

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On Fri, 3 Jan 2025 1:03:57 +0000, Richard Hachel wrote:

Le 01/01/2025 à 21:06, clzb93ynxj@att.net (LaurenceClarkCrossen) a écrit
:

Albert Einstein, “What Is The Theory Of Relativity?” (November 28, 1919) >>
In the London Times, Einstein explained this fact about his theory:

"The second principle, on which the special theory of relativity rests,
is the "principle of the constant velocity of light in vacuo." This
principle asserts that light in vacuo always has a definite velocity of
propagation (independent of the state of motion of the observer or of
the source of the light). The confidence which physicists place in this
principle springs from the successes achieved by the electrodynamics of
Maxwell and Lorentz."

The velocity of waves does not include the velocity of the source
because compression waves are formed, constraining the speed to that
dictated by the medium.

The velocity of both particles and waves includes that of the observer.

To deny that light velocity involves that of the observer is stupid,
illogical, and irrational nonsense. It is a denial of relative motion
itself.

I see that you still do not understand the theory of relativity.
This is very unfortunate, and I feel like I am unfortunately speaking
into
the void.
The second postulate of Poincaré (and not of Einstein who NEVER
postulated anything at all except copied the work of others) proposes something A PRIORI.
It is a postulate.
It postulates that the speed of light in a vacuum is invariant by change
of reference frame, which poses a double problem.
It is both true and false physically, and, secondly, it is a postulate
and
a postulate does not say why.

We do not have this double problem with Dr. Hachel.

In Hachel, who is very mean, not only is the postulate obviously derived
from another postulate that explains WHY (the notion of universal
anisochrony and the relativity of hyperplanes of simultaneity in the
same
stationary frame of reference) but moreover,
it explains that it is the transverse speed of light that is invariant,
and equal to c in all frames of reference.

I remind you, breathe, blow, do not feel unwell, that each observer, in Hachel, observes his universe live. It then becomes obvious that a light
ray is instantly perceived by any receiver (it could be my retina), and
that this speed (infinite) remains so by change of frame of reference
(it
is me who moves), or whatever the speed of the source.

On the other hand, if a photon flees me, I would always see it flee in
the
same way, and at the same speed (Vapp=c/2).

And this in whatever frame of reference I am in.

Which means that the transverse speed of a photon will always be equal
to
c, whatever frame of reference I am in (even if I am in a uniformly accelerated frame of reference).

The transverse speed of light will become a physical invariant.

So there is some truth and some falsehood in what physicists say.

They do not say that we observe the universe live, and believe that this galaxy which is 13 billion light years away (notion of distance) existed thirteen billion years ago (notion of time).

They do not understand that 13 billion years is a value given by a
geometric position of a distant observer who would observe the path of
the
photon transversely, but that it has nothing to do with my retinal
hyperplane of simultaneity.

They are absolutely incapable of passing Cape Hachel, and again, they
passed Cape Poincaré with some difficulty (they understand the notion of relativity of the internal chronotropy of watches) but, and this is for
me
an extraordinary phenomenon, even miraculous, the notion of anisochrony
and correct spatio-temporal geometry.

They remain stuck in a completely abstract and mathematically stupid Minkowskian block, and are incapable of seeing further.

This has always amazed me.

R.H.

Thank you. Someone had to step into the breach.

If the transverse speed of a photon remains the same as c even within a uniformly accelerating frame, this is what both particles and waves do
within such a frame. This makes it unnecessary for any postulates other
than Newtonian.

To imagine this takes place across (between) frames regarding the
endpoint or observer is irrational.

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Le 03/01/2025 à 05:43, clzb93ynxj@att.net (LaurenceClarkCrossen) a écrit
:

Thank you. Someone had to step into the breach.

If the transverse speed of a photon remains the same as c even within a uniformly accelerating frame, this is what both particles and waves do
within such a frame. This makes it unnecessary for any postulates other
than Newtonian.

To imagine this takes place across (between) frames regarding the
endpoint or observer is irrational.

Que la vitesse transversale de la lumière soit toujours égale à c, dans
un milieu galiléen uniforme,
c'est accepté de tous, puisque c'est ce que dit la théorie (et c'est ce
que valide le docteur Hachel en expliquant pourquoi).

Mais que la vitesse transversale de la lumière soit égale à c dans tous
les référentiels, y compris tournant, y compris uniformément
accélérés, je ne suis pas sûr que cela soit obvi pour tous.

C'est pourtant d'une grande évidence, si l'on réfléchit trois secondes.


Ce qui varie, dans un milieu accéléré, c'est la trajectoire. La ligne
droite devient une ligne courbe.

Mais sur cette ligne courbe, la vitesse de la lumière reste toujours constante.

"La vitesse transversale de la lumière est une constante en tout référentiel, galiléen, tournant, accéléré, ou tel qu'on le voudra"

R.H.

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On Fri, 3 Jan 2025 14:21:48 +0000, Richard Hachel wrote:

Le 03/01/2025 à 05:43, clzb93ynxj@att.net (LaurenceClarkCrossen) a écrit
:

Thank you. Someone had to step into the breach.

If the transverse speed of a photon remains the same as c even within a
uniformly accelerating frame, this is what both particles and waves do
within such a frame. This makes it unnecessary for any postulates other
than Newtonian.

To imagine this takes place across (between) frames regarding the
endpoint or observer is irrational.

Que la vitesse transversale de la lumière soit toujours égale à c, dans
un milieu galiléen uniforme,
c'est accepté de tous, puisque c'est ce que dit la théorie (et c'est ce
que valide le docteur Hachel en expliquant pourquoi).

Mais que la vitesse transversale de la lumière soit égale à c dans tous les référentiels, y compris tournant, y compris uniformément
accélérés, je ne suis pas sûr que cela soit obvi pour tous.

C'est pourtant d'une grande évidence, si l'on réfléchit trois secondes.

Ce qui varie, dans un milieu accéléré, c'est la trajectoire. La ligne droite devient une ligne courbe.

Mais sur cette ligne courbe, la vitesse de la lumière reste toujours constante.

"La vitesse transversale de la lumière est une constante en tout référentiel, galiléen, tournant, accéléré, ou tel qu'on le voudra"

R.H.

That the transverse speed of light is always equal to c, in a uniform
Galilean medium, is accepted by all, since this is what the theory says
(and this is what Dr. Hachel validates by explaining why). But that the transverse speed of light is equal to c in all frames of reference,
including rotating, including uniformly accelerated, I am not sure that
this is obviated for all. However, it is very obvious, if you think
about it for three seconds. What varies, in an accelerated environment,
is the trajectory. The straight line becomes a curved line. But on this
curved line, the speed of light always remains constant. "The transverse
speed of light is a constant in any referential, Galilean, rotating, accelerated, or as one wishes" R.H.

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