Watch This Magnet Fall Slowly Through Air
It's witchcraft science.
This video from 2012 is making the rounds right now–with good reason. Drop whatever you’re doing, leave your desk, quit your job, and find a magnet and copper tube, because, wow. Look at this! It’s a _Matrix _time-freeze in your hands.
The video is showing a demonstration of Lenz’s law: the magnet induces a current in the tube, and that current creates a magnetic field that pushes against the falling magnet. Try it with a similar setup (neodymium magnets work well), and bam: you’ve got yourself a slowly falling magnet. This phenomenon actually has practical applications in industrial separation of recylables, look: