| 释义 |
〔Foucault〕French physicist who estimated the speed of light and determined that it travels more slowly in water than in air (1850). He also employed a pendulum to prove the rotation of the earth (1851) and invented the gyroscope (1852).佛科，简·伯纳德·莱昂：(1819-1868) 法国物理学家，1850年测试出光速并确定光在水中的速度慢于在空气中的速度。他还于1851年用钟摆证实了地球的自转，并于1852年发明了回旋器 |