1000
A femtosecond is one billionth of one millionth of a second.
There are 10-15 seconds in a femtosecond.
FS
the femtosecond
Attosecond
10-15 seconds.
how many zeros in one billion
Seven zeros.
10-15hertz
12 zeros.12 zeros.12 zeros.12 zeros.
33 zeros