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Demonstrates: Levitation of a magnet above a superconductor.
Description: A superconducting disc is chilled in liquid nitrogen. A magnet at rest on the disc will rise and levitate as the disc transitions into the superconducting state. Internal magnetic fields are expelled and surface currents are set up (Meissner effect). The magnet can be moved in mid-air and can be spun around, inducing surface currents which prevent magnetic fields from penetrating the superconducting disc.
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