- #1
analyst5
- 190
- 2
Hey guys, as we know the concept of the rest frame is one of the most famous concepts in any kind of relativity, because it must be known in which frame the body is at rest.
My question is how do we define a rest frame on a solid object that has atoms vibrating, the body clearly does not have motion as a whole, it remains in place in some kind of way, but its atoms are vibrating and it isn't at rest in a different way. So what is different between standard analogy in SR between frames that are mutually at rest, and in real life when bodies are much more complex? What are the criteria?
My question is how do we define a rest frame on a solid object that has atoms vibrating, the body clearly does not have motion as a whole, it remains in place in some kind of way, but its atoms are vibrating and it isn't at rest in a different way. So what is different between standard analogy in SR between frames that are mutually at rest, and in real life when bodies are much more complex? What are the criteria?