Soap Film Minimal Surfaces

Unexpected interior surfaces form. Ask students to predict what will happen. Dip frames and compare film geometry. Key idea: Surface tension minimizes surface area while satisfying boundaries. Ask: Why does soap film solve a geometry problem by itself? Safety and cleanup: Soap tray; avoid eye contact. https://www.google.com/search?q=%22Soap+Film+Minimal+Surfaces%22+science+demonstration+experiment