Category Archives: Magnetism

The Meissner-Ochsenfeld effect: levitating magnets

Recently, I had the chance to see a presentation of cool scientific magic: the Meissner-Ochsenfeld effect. What you can see here is a magnet (the yellow-red cylinder) levitating above a small dish of superconductive material, and consequently free to spin in mid-air. The superconductor must be kept at liquid nitrogen temperature (-196 degrees C) to [...]