(August 15, 2015 at 11:04 pm)AFTT47 Wrote:(August 15, 2015 at 10:33 pm)excitedpenguin Wrote: How come it's the "fourth dimension" if it simply measures motion?
Think of a street address. If I want to meet you, I need to specify not only a 3-dimensional location but one of a time, also. If the time doesn't match up, we won't see each other.
How does that enter physics since this seems to be so entrenched in human affairs that it doesn't necessarily arise from that that we might use it to describe the way the cosmos works?
It just seems like such a funny concept if all we do is compare rates of motion against each other. It sounds more like utter nonsense, on the face of it. I just wish someone would offer me a healthier grasp of it so I could better conceptualize it.
