The bottom piece is cooled down so it gets superconductive. The one on the top is a magnet. Superconductor cannot be penetrated by magnetic fields. So the magnet kind of floats on his field.
The bottom piece is cooled down so it gets superconductive. The one on the top is a magnet. Superconductor cannot be penetrated by magnetic fields. So the magnet kind of floats on his field.