How about measuring variations in propagation delay for WWV on various frequencies, or WWVB, using GPS ticks as a reference.
Dana K8YUM On Fri, May 11, 2018 at 9:41 AM, Van Horn, David < david.vanh...@backcountryaccess.com> wrote: > > Measuring the speed of light (Fizeau or Michelson method? Other ways) > > > I saw a great demo of this at the Exploratorium in SF. They had a long > spool of fiber optic, a disc with holes, and a light source. When static, > if the light shines through the hole in the disc into the fiber, then you > can see the light coming out the other end of the fiber through a different > hole. When rotating, you increase speed and the fiber output gets dimmer > and dimmer till it's gone. At that point, the light going into the fiber > arrives when the other end is blocked, and vice versa. High tech, but > simple. > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.