Tuesday, June 12, 2012

Atomic Clocks and GPS


Ever wonder how an atomic clock keeps time so accurately?  Or how a GPS uses that time to calculate its position?  This video uses jello as a prop to explain exactly that.  There are a few details in there that are glossed over a bit, so I don't think I'll be building my own atomic clock based on this, but I have a better idea of how its done.  I had no idea that they've gotten the guts of those things down to such a small package.