Re: Vacuum Friction and Cosmological (Hubble) Redshift

"Vacuum has friction after all. A ball spinning in a vacuum should never slow down, right? Wrong. It turns out quantum effects can create a type of friction in the void."

A body such as a ball is made up of particles.
If this body is in rotation, it is also, of course, in motion.
And so the sum of this movement and this rotation therefore implies that the particles forming it advance by making zigzags. And not uniform rectilinear trajectories.
There is therefore no reason to invoke Newton's laws on bodies having inertia when we speak of rotating bodies.

Un corps tel qu'une balle est formé de particules.
Si ce corps est en rotation, il est aussi, évidemment en mouvement.
Et donc la somme de ce mouvement et de cette rotation implique donc que les particules le formant avance en faisant des zigzags. Et non des trajectoires rectilignes uniformes.
Il n'existe donc aucune raison d'invoquer les lois de Newton sur les corps ayant une inertie dès lors que nous parlons de corps en rotation.

EN REPONSE A

Le samedi 18 février 2023 à 20:40:17 UTC+1, Pentcho Valev a écrit :

"Vacuum has friction after all. A ball spinning in a vacuum should never slow down, right? Wrong. It turns out quantum effects can create a type of friction in the void." https://www.newscientist.com/article/mg20927994-100-vacuum-has-friction-after-all/
 
Vacuum has friction after all. Photons traveling through vacuum should never slow down, right? Wrong. It turns out quantum effects can create a type of friction in the void.

Pentcho Valev