an incredibly accurate timekeeping device controlled in correspondence with a characteristic invariant regularity of an atomic or molecular system.
an exceptionally accurate guide time clock whose operation is founded on an atomic process, typically the frequency of electromagnetic radiation connected with a specified energy-level change in a component such cesium.
A radio clock.
a timepiece that derives its time scale from the vibration of atoms or particles
an incredibly precise timekeeping device regulated in communication with a characteristic invariant frequency of an atomic or molecular system.
an incredibly accurate research clock whoever procedure is dependant on an atomic process, often the regularity of electromagnetic radiation associated with a specified energy-level change in a component such as for instance cesium.
A radio time clock.
a timepiece that derives its time scale through the vibration of atoms or molecules