Strangely in Sync










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The pendulum clock was invented in 1665 by Dutch physicist Christiaan Huygens. From its invention in 1656 until the 1930s, the pendulum clock was the world’s most precise timekeeper. The clock uses a swinging weight that swings back and forth in a precise time interval. 

Huygens noticed something odd when he was watching two of his pendulum clocks hung next to each other on the wall. No matter how the pendulums started, they ended up swinging in exactly the opposite direction from each other within about a half-hour. Huygens suggested that the synchronous behavior of the clocks he observed might be caused by “the imperceptible vibrations of the beam on which they are hanging.”Researchers have found that the support connecting the clocks serves as a kind of communication channel between the clocks, which they use to exchange energy. 

 “There still are hidden secrets to be revealed, and consequently, further studies of this system are necessary in order to unveil more details about the complex yet intriguing synchronization phenomenon”


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