[time-nuts] Anybody have suggestions for time related science fair projects?

Dana Whitlow k8yumdoober at gmail.com
Fri May 11 11:22:44 EDT 2018

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.vanhorn at 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.
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