General Discussion
In reply to the discussion: I KNOW FOR A FACT THAT trump is going to lose in November. [View all]qazplm135
(7,654 posts)at different speeds for two reasons (really the same reason because they are linked)...because of the presence/degree of a gravity well (more gravity slower time) or because of the velocity you travel (faster you go slower time goes) and vice versa.
That's it. Those are the two reasons. This is probably because time isn't separate but an amalgam of spacetime, and probably because gravity is a function of spacetime too. It's not surprising that they would be related.
But if you and I are in the same gravity well, going the same speed, then objective time goes the same.
Now, subjectively, we might experience time differently. If you are excited or happy, time might feel like it is flying...and if I am bored or sad or in pain, time might feel like it slows down...but those are SUBJECTIVE feelings, not objective reality. If we are wearing a clock, time will be the same for both of us, regardless of how we perceived it emotionally or subjectively.
And sending information backwards about an event to before the thing that caused that event is still a violation of causality, no matter how fast time went for someone. It's still a violation of Newton's Second Law. It's still putting effect before cause. It still requires a fixed future with no randomness that we know exists thanks to quantum mechanics.
Einstein didn't "change physics." The vast majority of physics that was right before him, is right now. Newton's laws are still solid. His gravity theories are still mostly right. It's just that Einstein was more right, and in a more specific way.