4 ms·
It pretty succinctly expresses what makes time special; it's the imaginary dimension (as in numbers)! You can say you're always going c, and you won't be wrong
by ravi-delia 4y ago
It pretty succinctly expresses what makes time special; it's the imaginary dimension (as in numbers)! You can say you're always going c, and you won't be wrong for a given metric, but time is special because it's where the "velocity" gets sunk into when all the spacial dimensions are grouped as one. Obviously none of this is any different from what you said, but since the article is about what makes time special it's not unfair to think about velocity components in time and space differently.
- mikewarot 4y agoThe Electromagnetic Vector Potential field, usually labeled A is also something that many treat as merely a mathematical convenience. However, it can be directly observed using a Superconducting QUantum Interference Device (SQUID). It is fitting that we use a similar quantum phenomenon, oscillations of the Cesium atom to measure time.