Why does gravity affect time too?
Two stationary clocks at different heights accumulate different durations. How gravitational potential, exchanged signals and atomic-clock experiments explain the effect.
Tag archive
#time
Articles: 4
Why does time slow down during fast motion?
A light clock explains which intervals relativity compares, why a moving clock runs slow and how the travelling-twin puzzle is resolved.
What is time, and why do we measure it?
A clock compares durations between events with a repeating reference process. Learn to distinguish instants, intervals and frequency, and why the second is defined using cesium-133.
Why do we see distant galaxies as they were in the past?
Light brings earlier events with a delay. Distinguish light travel time, galaxy age and present distance in an expanding Universe.