A note on levitating frogs and superconductivity
Last week we took a look at diamagnetic levitation and how you can use a powerful magnetic field to levitate frogs, tomatoes and theoretically humans.
Another cool demonstration of diamagnetic levitation. is with an array of magnets and electrolytic carbon.
Electrolytic carbon being diamagnetic ( Remember that a diamagnetic material is one which would rather ‘die’ than be attracted to a magnetic field ) opposes the magnetic field set up by the magnet array and levitates !
Superconductors when cooled below a critical temperature in principle are just ideal diamagnets in that they completely expel the magnetic field due to the meissner effect.
However, always keep in mind that the fundamental origins of diamagnetism in superconductors and normal materials are extremely different and must not be confused.
A2A (Anonymous): Are superconductors and diamagnets the same ?
Thanks for asking!