frequency standard

A frequency standard is a precise measurement system that defines the frequency of a periodic signal, often used to maintain accurate timekeeping. For instance, atomic clocks use the vibrations of atoms, such as cesium or rubidium, to create highly stable frequencies. These frequencies serve as a reliable reference for synchronizing time worldwide, as they ensure that clocks keep accurate time. Frequency standards are crucial in various technologies, including GPS, telecommunications, and scientific research, enabling consistency and precision in measurements and operations.