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.
Tag archive
#clocks
Articles: 2
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.