In 1845 he and Léon Foucault (1819–68) took the first photographs of the sun. In 1849 he measured the speed of light; he also analysed the Doppler effect for light.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。