3 ms·
Yes, and it doesn't appear that any of the weird things under discussion in this case have anything to do with a GUT or TOE. The important thing to remember is
by greglindahl 10y ago
Yes, and it doesn't appear that any of the weird things under discussion in this case have anything to do with a GUT or TOE. The important thing to remember is that theories like Newton's Law do a great job in a large number of regimes -- you have to look at things like the precession of Mercury or an atomic clock in orbit to see why Einstein is needed.
- lisivka 10y agoI believe, if we take in account wave-particle duality, then we will be able to explain large parts of General Relativity using Newtonian physics, because waves are propagating, so second postulate is obvious, for example.
- duaneb 10y agoNewtonian laws are excellent for intuition about human-scale problems. What do we gain from modeling GR that way?
- lisivka 10y agoIntuition at GR-scale problems. Why I need to believe in Einstein postulates if I can just look at walking droplet 2D model of QM and see that these postulates are obvious?
- raattgift 10y agoWhy do you need to consider Einstein's postulates if you can just look at a ball traversing a rubber sheet with a depression in it, for that matter? Same answer: because these rough analogues are not background-independent -- you would see a very different picture in each case if you moved the walking droplet or rubber sheet setups to the moon or to the ISS. Einstein GR postulate number one: microscopic physics is background-independent. These experiments' microscopic details behave the same on Earth, on the moon, and in the ISS, but their macroscopic behaviours sure don't. You have to input details of the local structure of spacetime into each of them if you want to predict their results (e.g., what trajectory the walk takes, or how long it takes for a ball to reach the bottom of a depression in the rubber sheet) successfully.
- duaneb 10y agoThis was really well explained; thank you.