Two metronomes are placed on a common base. The metronome on the left is set at 192 beats per minute. The one on the right is set at a slightly lower rate. The metronome pendulums are initially out-of-phase. The two pendulums oscilate in phase due to conservation of momentum and coupling via the base. A [...]]]>

Two metronomes are placed on a common base. The metronome on the left is set at 192 beats per minute. The one on the right is set at a slightly lower rate. The metronome pendulums are initially out-of-phase. The two pendulums oscilate in phase due to conservation of momentum and coupling via the base. A true physics masterpiece!
Video Rating: 4 / 5

Synchronisation of 5 coupled metronomes done in Lancaster University, Physics Dep, Nonlinear dynamics and medical physics group. Emails related to this video can be sent to: a.bahraminasabNOSPAM at gmail dot com. Some explanation by ’shoonya’ which I think is pretty good: Here you go: metronomes (or “pendula”) when on table, oscillate with random phases, since that is how they started and they are “uncoupled” (no energy/information flows from one to other so they do not “know” each other.) When they are all together on the cans, notice that the cans themselves oscillate little, providing coupling/information crossover. which forces “synchronization” in periodic systems (discovered by Huygens in 17th century). A useful book: “Synchronization: A Universal Concept in Nonlinear Sciences ” by Arkady Pikovsky, Michael Rosenblum and Jurgen Kurths. A scientific article: scitation.aip.org My personal homepage: www.lancs.ac.uk Reference to the original video: youtube.com
Video Rating: 4 / 5

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