atomic standards

Atomic standards are highly precise references based on the properties of atoms, often used to define measurement units. For example, the meter is now defined by the distance light travels in a specific fraction of a second, tied to the atomic properties of cesium atoms. Using atomic standards ensures measurements are consistent, accurate, and reproducible worldwide, since atoms are the same everywhere. This approach replaces older methods based on physical objects or arbitrary references, providing a stable foundation for scientific research, technology, and industry.