_PM_ME_PANGOLINS_ t1_j29nz9i wrote on December 30, 2022 at 5:34 PM

Reply to comment by majorpickle01 in has the speed of light always been constant? by 2bornnot2b

There’s nothing we’ve found that says it has to have the value that it does, or that it can’t change at all, so it’s not completely out there to investigate the maths of if it did change over time and whether that predicts anything measurable.

majorpickle01 t1_j29yae1 wrote on December 30, 2022 at 6:38 PM

I don't think it's out there at all and it could be a fascinating avenue of research haha. I wasn't trying to be dismissive - I just know there's been a few papers put out speculating on a changing value of speed of causality, just I don't think there's been enough evidence or testability to really "mean" anything scientifically

CompactOwl t1_j2ba062 wrote on December 30, 2022 at 11:54 PM

My level of physics is limited to what I understand on the side because of my math major, but I have a question:

If speed of causality changes, would we even be able to measure that? Or what the change in causality cancel in all of our measurement instruments to give the same result again?

majorpickle01 t1_j2bvhwy wrote on December 31, 2022 at 2:32 AM

from the very limited reading I've seen into the subject the idea is it would be detectable in the CMB - something along the lines is it would affect the distributions of bands or something like that.

If you do some digging for papers on it there's are suggestions on how to test for it / physical consequences