atomic clock

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Related to Atomic clocks: white dwarf, Cesium clock

atomic clock

n.
An extremely precise timekeeping device regulated in correspondence with a characteristic invariant frequency of an atomic or molecular system.

atomic clock

n
1. (Atomic Physics) an extremely accurate clock in which an electrical oscillator is controlled by the natural vibrations of an atomic or molecular system such as caesium or ammonia
2. (Horology) an extremely accurate clock in which an electrical oscillator is controlled by the natural vibrations of an atomic or molecular system such as caesium or ammonia

atom′ic clock′


n.
an extremely accurate electronic clock regulated by the resonance frequency of atoms or molecules of certain substances, as cesium.
[1935–40]

atomic clock

An extremely precise clock whose rate is controlled by the vibration of particular atoms or molecules whose frequency does not change. The standard kind of atomic clock, which is based on the vibrations of cesium atoms, gains or loses less than one second in three million years. Atomic clocks are used to help track satellites, run navigation systems, and study movements of the Earth's crust.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.atomic clock - a timepiece that derives its time scale from the vibration of atoms or moleculesatomic clock - a timepiece that derives its time scale from the vibration of atoms or molecules
ammonia clock - an atomic clock based on vibrational frequency of the nitrogen atom in the ammonia molecule
caesium clock - an atomic clock based on the energy difference between two states of the caesium nucleus in a magnetic field
horologe, timepiece, timekeeper - a measuring instrument or device for keeping time
Translations
Atomuhr
References in periodicals archive ?
The technique rapidly measures physical effects that are important to atomic clocks, thus improving the clocks precision, and it can add new atomic-level detail to studies of phenomena such as magnetism and superconductivity.
Atomic clocks use the tiny movements of atoms to measure time, like a miniature version of the pendulum in the tower of a grandfather clock.
Until now, atomic clocks have treated each atom as a separate quantum particle, and interactions among the atoms posed measurement problems.
Summary: Three atomic clocks in the first navigation satellite IRNSS-1A have already failed, forcing the ISRO to run the NavIC system with one clock switched on and two on stand-by
GPS satellites contain atomic clocks that attach very precise time data to GPS signals.
Since Essen's pioneering work, the accuracy of atomic clocks has improved by a factor of 10 or so every decade.
Now a plethora of time-sensitive systems, including computer programs and financial markets, rely on the precise ticking of atomic clocks that measure the energy transitions of atoms.
Experiments on an unused 'dark' fibre optic link between London and Paris could lead to atomic clocks round Europe being synchronised with unprecedented precision.
WASHINGTON (CyHAN)- The Deep Space Atomic Clock, or DSAC project, managed by NASA's Jet Propulsion Laboratory in Pasadena, California, is developing -- for use aboard spacecraft -- a smaller and lighter version of the refrigerator-sized atomic clocks used at ground-based space tracking stations.
That agency collates data from atomic clocks around the world to produce Coordinated Universal Time (UTC), the international standard of time.
Lutwak was chosen as the recipient of this prestigious award as a result of his role to overcome the intrinsic physical barriers to affordable chip scale atomic clocks, enabling precision time and time transfer in mobile GNSS and communications systems.
31, 2008 - we need to add another second to our atomic clocks.