Measuring the speed of light only with a cog, a piece of glass and a mirror is so clever. The relevant part of the video starts at 4:06. A history of measureme

Measuring the speed of light only with a cog, a piece of glass and a mirror is so clever. The relevant part of the video starts at 4:06. A history of measurement of the speed of light can be found there https://en.wikipedia.org/wiki/Speed_of_light#History https://en.wikipedia.org/wiki/Speed_of_light#History