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The meissner effect is the property that type 1 superconductors have where if you put a magnet in close proximity to it, a current is induced. This in turn produces a magnetic field, which has the same polarity as the original field that caused the current. This causes the magnet to levitate above the superconductor.
This effect was first demonstrated by W. Meissner and R. Ochenfeld in 1933.
There is a Demonstration kit available.
Breaking news (2003/08/01) tells us that a weak gravitational shielding effect occurs with some superconductors in special conditions related to this effect.
last modified 05:22 2004/11/26