Increasing pressure on the water compresses the air bubble in the small plastic vial, causing the vial to sink and rise. via Physicsfun | UNILAD Tech

Reverse Cartesian Diver https://physicsfunshop.com/ Physics puzzle: On the left is a Cartesian diver- pressing on the bottle forces water into the glass diver, which then compresses the bubble in diver’s head allowing it to sink. On the right is a reverse Cartesian diver- again the bottle is pinched but this time the diver ascends- why? (See video in comments for hint) ➡️ Follow the linkabove for info on how to make this device and find other amazing items featured here on Physicsfun | Physicsfu