Pyrolytic Graphite Floats Over Magnets

Thin black square visibly levitates. Ask students to predict what will happen. Place graphite above magnet array. Key idea: Graphite is strongly diamagnetic and is repelled from regions of stronger magnetic field. Ask: How can something be repelled by both magnet poles? Safety and cleanup: Strong magnets teacher-only; graphite fragile. https://www.google.com/search?q=%22Pyrolytic+Graphite+Floats+Over+Magnets%22+science+demonstration+experiment