4 ms·
No, at least second and meter are defined with math and elementary physics (e.g. second is the time it takes for a specific atom to oscilate a specific number o
by tomp 11y ago
No, at least second and meter are defined with math and elementary physics (e.g. second is the time it takes for a specific atom to oscilate a specific number of times).
- fanf2 11y agoNot the atom, the electromagnetic radiation emitted by a specific quantum transition of the atom. (Cs 133 and 9192631770 Hz)