3 ms·
Since 1967 the second has a physical defintion: https://en.wikipedia.org/wiki/Second#Atomic_definition https://en.wikipedia.org/wiki/Second#Atomic_definition
by xorcist 1y ago
Since 1967 the second has a physical defintion:
https://en.wikipedia.org/wiki/Second#Atomic_definition https://en.wikipedia.org/wiki/Second#Atomic_definition
- dguest 1y agoThis new clock is way more accurate than that baseline definition though. The SI definition is a practical one for almost everything, the new clock is useful if you are e.g. looking for shifts in physical constants over time.