How does levitation work?
Opposites Attract, Same Polarity Repels The basic premise of levitation revolves around the principles of magnetic polarity. While two magnets of opposite polarities are naturally attracted to one another, two magnets with the same polarity push away from one another with considerable force. When the magnets are electrically charged, creating electromagnets, this effect is magnified and the repulsion between the two magnets becomes exponentially more powerful. Magnets Are Strategically Mounted To affect levitation, magnets are mounted on the ground and on the underside of the device to be raised; the magnets are situated so that the two sides facing one another are of the same polarity. Small items, like tables, can be levitated relatively quickly and with little effort, though larger items, like trains and buses, require the use of very powerfully charged electromagnets. As electricity passes through the magnets, the repelling force between two magnets escalates to push the two device
