Measurement of the Speed of Light光速的测量
Experimental measurements of the speed of light have been refined in progressively more accurate experiments since the seventeenth century. Until about 1850 the propagation of light was viewed in mechanical terms and it was presumed that it moved in a medium called the "luminiferous ether". 自17世纪以来，光速的测量结果在越来越精确的实验中得到了改进。直到大约1850年，人们仍用机械的观点来看待光的传播，并假定光是在一种称为“光以太”的介质中传播的。
The first measurement of the speed of light is attributed to Danish astronomer Roemer. He measured systematic variations in the times at which the moons of Jupiter moved into the planet's shadow. Attributing these variations to different transit times for the light coming from Jupiter's orbit to the earth, he was able to calculate the speed of light. 光速的首次测量归功于丹麦天文学家罗默。他观察到木星卫星进入行星阴影的时间存在系统性变化。将这些变化归因于来自木星轨道到地球的光传播时间差异，他得以计算出光速。
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Index Relativity concepts Reference French Ch 2 索引 相对论概念 参考法语第2章 | ||
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