One Of Those Weird Things |
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Sep 30 2015, 09:49 PM
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All set to the same rhythm but started at different times and ending up synchronised all on their own. This was first discovered in 1670 by pendulum clock inventor Christiaan Huygens.
Before Huygens closed up shop for a long weekend, he wound up all the pendulum clocks hanging on his wall, and set them to tick-tocking back and forth, none of the pendulums swinging together. When he returned, Huygens was astonished to discover that all of the pendulums were perfectly synchronized, swinging together tight as Duke Ellington’s rhythm section . Huygens had discovered what we now call entrainment, the tendency of things to vibrate at the same frequency. Watch entrainment happen before your very eyes 
This post has been edited by Phil66: Oct 1 2015, 08:09 AM -------------------- SEE MY GMC CERTIFICATE  “Success is not obtained overnight. It comes in instalments; you get a little bit today, a little bit tomorrow until the whole package is given out. The day you procrastinate, you lose that day's success.” Israelmore Ayivor |
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Oct 1 2015, 08:13 AM
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Thanks Mertay,
I've embedded a YT now. I can kind of understand how it happens but I'd like to see what happens if exactly half of the metronomes were started one way and the other half the other way at the same time. I bet they would stay as they are because of equal and opposite forces. 
-------------------- SEE MY GMC CERTIFICATE “Success is not obtained overnight. It comes in instalments; you get a little bit today, a little bit tomorrow until the whole package is given out. The day you procrastinate, you lose that day's success.” Israelmore Ayivor |
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Oct 1 2015, 12:48 PM
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Yes I noticed that. I think it would still happen on a solid table because vibration is hard to eliminate. Huygens discovered it after leaving pendulum clocks for a long weekend. Maybe on an ultra solid table it would take weeks. It is definitely a proven scientific phenomenon though. Maybe the not so solid table was to speed up the demo?
-------------------- SEE MY GMC CERTIFICATE “Success is not obtained overnight. It comes in instalments; you get a little bit today, a little bit tomorrow until the whole package is given out. The day you procrastinate, you lose that day's success.” Israelmore Ayivor |
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Oct 2 2015, 02:46 PM
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Awesome! I've never heard about this. It's not exactly on topic but this thread made me remember this movie:
-------------------- My lessons
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Oct 2 2015, 03:48 PM
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When an army crosses a bridge they fall 'out' of step for that very reason.
*Great book ... https://books.google.com/books?id=Bwd-MHINMGsC -------------------- - Ken Lasaine
https://soundcloud.com/klasaine2/foolin-the-clouds https://soundcloud.com/klasaine2/surfin-at-the-country-hop Soundcloud assorted ... https://soundcloud.com/klasaine3 New record ... http://www.cdbaby.com/cd/kenlasaine Solo Guitar ... https://www.youtube.com/playlist?list=PLXZh...5iIdO2tpgtj25Ke Stuff I'm on ... https://www.youtube.com/playlist?list=PLXZh...b-dhb-4B0KgRY-d |
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