So I never explained what they measure. so today I’m going to do that. Starting… now!

So Decisecond 1/10 second its the tenths on a stopwatch.

Millisecond1/1,000 second it is the speed of human reaction times.

Microsecond 1/1,000,000 second balloon pops are this fast.

Nanosecond 1/1,000,000,000 second it takes this long for light to travel about one foot

Picosecond 1/1,000,000,000,000 second computer processor operations take this long.

Femtosecond 1/1,000,000,000,000,000 second Chemical reactions are this fast

Attosecond 1/1,000,000,000,000,000,000 second Electron dynamics inside atoms and quantum mechanics are this fast.

Zeptosecond Subatomic events, such as the time it takes a photon to cross a hydrogen molecule are this fast.

Yoctosecond Radioactive decay of tiny subatomic particles like quarksare this fast.

Planck Time The absolute theoretical limit of the smallest possible measurement in physics