# Foucault's measurements of the speed of light

> scientific instrument used to measure the speed of light

**Wikidata**: [Q1256668](https://www.wikidata.org/wiki/Q1256668)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Foucault's_measurements_of_the_speed_of_light)  
**Source**: https://4ort.xyz/entity/foucault-s-measurements-of-the-speed-of-light