Chapter32 Relativity Clocks moving relative to an observer are measured by that observer to run more slowly (as compared to clocks at rest. (p741) Experiments have tested the time-dilation effect, and have confirmed einstein's predictions In 1971, for example, extremely precise atomic clocks were flown around the world in jet planes. The other is the lifetime of a moving muon 1971年美国科学家在地面对准精度为10-9秒铯原 子钟,把4台原子钟放到喷气式飞机上绕地球飞行一圈, 然后返回地面与地面静止的比较,结果慢了59毫微秒。 与相对论值只差10%,后来将原子钟放到飞船上实验 精度进一步提高。Clocks moving relative to an observer are measured by that observer to run more slowly (as compared to clocks at rest. (p741) Experiments have tested the time-dilation effect, and have confirmed Einstein’s predictions. In 1971, for example, extremely precise atomic clocks were flown around the world in jet planes. The other is the lifetime of a moving muon. 1971年美国科学家在地面对准精度为109秒铯原 子钟，把4台原子钟放到喷气式飞机上绕地球飞行一圈， 然后返回地面与地面静止的比较，结果慢了59毫微秒。 与相对论值只差10％，后来将原子钟放到飞船上实验 精度进一步提高