idea
Time and motion
In relativity, two clocks need not agree. A clock on a fast journey runs slow, and a clock higher in a gravitational field runs a little faster than one lower down. Satellite navigation has to correct for both effects to stay accurate.
Connects to
- Geometry
- Clocks
- The arrow of time
- Gödel’s rotating universe
- Light takes time
- Is there a shared now?
- Does time flow?
- How accurate can a clock be?
- What is the far sky like now?