This is a really strange and surprising effect. When you drop an earth magnet through a copper pipe it appears to slow down falling and spinning at a lower rate than it should.

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Strange physical phenomenon: Lenz’s Law explains why a magnet going down a fat copper pipe slows down and spins. Photo: Youtube video

The falling magnet induces a current in the copper pipe and, by Lenz’s Law, the current creates a magnetic field that opposes the changing field of the falling magnet. Thus, the magnet is “repelled” and falls more slowly.

You did not understand, it is not a big deal. Just get hyptnotized once more by this amazing and weird physical phenomenon!

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