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Watching this video will waste 1.75 minutes of your time. But hey, afterwards you’ll have this cool bit of nerdy almost-knowledge in your head.
That is mesmerising! I wish someone had shown me this demonstration when we were doing wave interference in physics. It would have helped me visualise what was going on.
That is incredibly cool — sufficiently so that long before it ended I was thinking “I’ve got to build one of those”. One drawback — watching it actually made me feel slightly queasy!
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