What makes this foil ring float with no strings attached? ⚡️ Using a handheld Van de Graaff generator, we build up a strong negative charge. When a lightweight foil ring is brought close, it picks up some of those electrons. Since like charges repel, the ring is pushed away by the electrostatic force, causing it to levitate! #Electricity #Science #VandeGraaff #Experiment #Demonstration | Museum of Science, Boston