By Jordan Gaither
Updated Aug 30, 2022
Magnetism is a fascinating force that can push and pull objects without contact. By harnessing this principle, you can create a simple anti‑gravity system that lets nearly any item hover above the ground. This guide explains the materials, methods, and safety considerations for levitating everyday objects.
Bismuth is a non‑ferromagnetic metal that becomes strongly repelled by neodymium‑iron‑boron (NdFeB) magnets when cooled into a solid plate. To build a bismuth plate, melt bismuth and cast it into thin sheets. When a NdFeB magnet is placed on the plate, the two repel, creating lift. By attaching several magnets to the underside of an object and positioning the bismuth plates beneath, you can generate a rudimentary flotation platform.
Most hobby magnets are dipolar, featuring a north and a south pole. When two magnets with like poles face each other—north against north or south against south—they repel strongly. To levitate, affix a cluster of dipolar magnets to the base of the object, all with the same pole pointing downward. Place a second cluster on the floor with opposite poles facing up. The mutual repulsion lifts the object, and the magnets’ own weight keeps the system stable.
Some ferromagnetic metals, such as iron, can be magnetized to a degree that allows them to repel external magnets. By laying a sheet of magnetized iron on the floor and attaching repulsive NdFeB magnets to the object’s base, you create a tension field that can support lightweight items. The effectiveness depends on the weight of the object and the strength of the magnets.
This technique is popular for desk decorations. Place a single polar magnet flat on a surface. Position a second identical polar magnet on the floor, also with the same pole down, so they repel. Insert a third bipolar magnet between them; its opposite poles allow it to remain suspended in the gap. The magnet’s weight balances the repulsive forces, keeping it afloat without attachment.
Safety Note: NdFeB magnets are powerful and can snap together with significant force. Keep them away from electronics, credit cards, and the human body, especially the eyes. Always handle magnets with protective gloves and store them securely.
