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Burning_Inside
Elite Mentor
Flying clocks
The most celebrated experimental backing for special relativity came in 1971, when four cesium atomic beam clocks were flown around the world. Einstein's theory predicted the clocks would lose 40 ± 23 nanoseconds compared with reference clocks on the ground when circling the globe eastward, and gain 275 ± 21 nanoseconds when traveling west. The results: a loss of 59 ± 10 nanoseconds eastbound and a westbound gain of 273 ± 7 nanoseconds -- evidence that time is not absolute but dependent on frame of reference.
The most celebrated experimental backing for special relativity came in 1971, when four cesium atomic beam clocks were flown around the world. Einstein's theory predicted the clocks would lose 40 ± 23 nanoseconds compared with reference clocks on the ground when circling the globe eastward, and gain 275 ± 21 nanoseconds when traveling west. The results: a loss of 59 ± 10 nanoseconds eastbound and a westbound gain of 273 ± 7 nanoseconds -- evidence that time is not absolute but dependent on frame of reference.
