3 ms·
The atomic wrist watch has been around for a while though. http://www.leapsecond.com/pages/atomic-bill/ http://www.leapsecond.com/pages/atomic-bill/
by PoachedSausage 9y ago
The atomic wrist watch has been around for a while though.
http://www.leapsecond.com/pages/atomic-bill/ http://www.leapsecond.com/pages/atomic-bill/
- lopmotr 9y agoThis is an optical lattice clock which is a newer and more accurate technology than the older cesium beam type of that "wristwatch".