Synchronizing Metronomes

This video illustrates the temporal synchronization of metronomes coupled via a common ground plate. This (well-known) phenomenon goes back to the observations of Christiaan Huygens (die Pendeluhr: Horologium oscillarium, 1763). Timeline: 0:00 - Setup and “What’s going to happen?“ 0:21 - Synchronization from arbitrary positions 1:04 - Re-synchronization after disturbance