dandan, 10 months ago To get even more pedantic... It's defined on how far light will travel in a vacuum in the time it takes caesium-133 to do a certain number of transitions between hyperfine ground states. It's cool how almost all units of measure are defined on caesium
To get even more pedantic...
It's defined on how far light will travel in a vacuum in the time it takes caesium-133 to do a certain number of transitions between hyperfine ground states.
It's cool how almost all units of measure are defined on caesium