Foucault's method in new settings
physics.optics
/ Abstract
In this paper, we introduce two simple and inexpensive versions of the well-known Foucault method for measuring the speed of light. In a footprint of just 20 cm by 270 cm with readily available laboratory items and a webcam, we obtained $c=296720\pm3000$ km/s, and $c=302295\pm3000$ km/s, respectively, both within less than a per cent of the defined value. The experiment also prepares students to work with large amounts of data.