Pyrolytic Graphite Floats Over Magnets
Thin black square visibly levitates.
Teaching & key ideas
What you do: Place graphite above magnet array.
What students see: Thin black square visibly levitates.
Why it works: Graphite is strongly diamagnetic and is repelled from regions of stronger magnetic field.
Question to ask: How can something be repelled by both magnet poles?
Lesson flow
Predict → demonstrate → observe → briefly explain → ask: How can something be repelled by both magnet poles?