The General Relativity Einstein/Essen Anniversary Test was conducted in September of 2005 by Daniel Kleppner and his kids. They took several very accurate cesium atomic clocks from home and parked 5,400 feet up Mt. Rainier for a full two days. The goal was to see if the clocks actually gained time as predicted by Einstein's general theory of relativity. Gravity at 5,400 feet is less (by about 0.1%) than at home at 1,035 feet, and therefore the clocks should run 22 ns faster over the two days. Did they? The plot to the left shows the results. Click on the image for full details.
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