Re: SpaceTime

Richard Hachel wrote:

>
Le 02/06/2024 à 19:48, hitlong@yahoo.com (gharnagel) a écrit :

>
Actually, the speed of light is really, really slow compared
to the size of the universe.  This, of course, is a proof
that tachyons MUST exist.

>
 Tu dis n'importe quoi.
>
Les tachyons ne peuvent pas exister, car il s'agirait d'une absurdité physique.

Not at all.  It's not up to us to say what can and cannot be.  It
is absurd to pretend that we are God.

 Vous confondez possibilité technologique et possibilité théorique.

I'm not confusing them, but confirming the existence of tachyons will
be difficult.  The most likely candidate to be tachyons are neutrinos,
but neutrinos are produced by nuclear interactions and, therefore, most
have energies much higher than their "proper" mass and are traveling at
speeds very close to that of light.  So close that we can't determine
whether they are moving slightly slower or faster than c.
So, yes, it becomes a technology problem, as you imply.  One
theoretical
problem for tachyons is the purported possibility that they cause
violations of causality.  This is not possible, however, as asserted in
DOI: 10.13189/ujpa.2023.170101.

 Comme si, un jour, on pouvait dessiner un carré rond, ou synthétiser
de
l'eau déshydratée.

Now your claiming impossibility on theoretical grounds, and doing by
analogy, not science.  That is not a valid science.

 Vous ne vous rendez pas compte que ce n'est pas une propriété technologique qui meut les photons à cette vitesse, mais une propriété de l'espace et du temps : l'anisochronie.

Bradyons, which make up us, cannot reach the speed of light, but you
forget that photons are born going the speed of light.  Tachyons are
born
going faster than light.  And they don't violate causality.

 Je reste stupéfait par la réflexion stupide des hommes qui mettent la charrue avant les boeufs.

More invalid analogies.