Word of the day

Femtosecond.

This is quite a small unit of time. A femtosecond is one billionth of one millionth, or one quadrillionth of a second. For context, a femtosecond is to a second, what a second is to about 32 million years, also it can be explained much easier ( one femtosecond can be considered as the diameter of human hair piece, so one femtosecond compared to one second is like the diameter of hair piece to the space between earth and moon.

Now you know.