Demo of Einstein’s Principle of Equivalence

A spring inside long tube is attached to a small weight hanging over the lip of the funnel. When the tube is allowed to fall freely, gravity vanishes in the falling reference frame—and the spring pulls the weight over the funnel’s lip into the funnel. The accelerating frame erased gravity momentarily, demonstrating the equivalence of acceleration and gravitation… the key insight of General Relativity! StephenRosen@gmail.com

A spring inside long tube is attached to a small weight hanging over the lip of the funnel. When the tube is allowed to fall freely, gravity vanishes in the falling reference frame—and the spring pulls the weight over the funnel’s lip into the funnel. The accelerating frame erased gravity momentarily, demonstrating the equivalence of acceleration and gravitation… the key insight of General Relativity! StephenRosen@gmail.com