Topic: Atomic Clocks - showing HP caesium clock and Russian Soyuz clocks
A demonstration with explanation of the super accurate Hewlett Packard (as was)/Agilent caesium clock. Of interest for geeks of laboratory instruments. This clock was the type that proved the part of Einstein's Theory showing a difference of measured time between clocks travelling two ways round the earth. The accuracy will amaze you, guaranteed!
https://www.youtube.com/watch?v=eOti3kKWX-c
This next clock tested was the clock used on the Soyuz spacecraft - just to make a comparison.