Shaken chains that spontaneously unmix to form two spirals
410 views · Published 17 September 2012 · 1:34 · Indexed 25 September 2026
Channel: Stephen Morris · 2012 · Science & Technology
Two ball chains (the kind you find on light switches or inside toilets) are shaken on a long rectangular horizontal plate. The shaking provides something like temperature and the chains are something like 2D self-avoiding polymers. The two chains are each 76 cm long and identical except that they are colored red and blue. After a while, they spontaneously separate from each other and wind themselves into two tight spirals, which then interact. The shaking frequency was 20Hz. The pictures are taken 5s apart and animated at 12fps, so each second of the movie is 60 seconds of real time. Video by Justin Bondy
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