Simple harmonic motion describes the vibration of atoms, the variability of giant stars, and countless other systems from musical instruments to swaying skyscrapers.

Start the pendulum oscillating vertically. Wait for it to change to torsional oscillations. Additional Resources. References. PIRA 3A70.10 ; Video Encyclopedia 9-08 ; Sutton S-18; DHP Mx-11 ; U. Köpf, ...

In 1665 Christiaan Huygens discovered that two pendulum clocks, hung from the same wooden structure, will always oscillate in synchronicity. Today, some 350 years on, Eindhoven and Mexican ...