Atomic Clock is a device that measures time by
the frequency of radiation emitted by an atom or molecule when it
makes a transition between two energy states. Atomic clocks are
extremely precise and are used to keep universal time-the international
basis for establishing legal and scientific times and for setting
all public and private clocks worldwide. Most atomic clocks in use
today are passive cesium clocks. The United States National Bureau
of Standards (NBS, now National Institute of Standards and Technology,
or NIST) established the second as the time radiation would take
to go through 9,192,631,770 cycles at the frequency emitted by cesium
atoms making the transition from one state to another. Cesium clocks
are so accurate that they will be off by only one second after running
for 300 million years. The atomic clock has led to new and more
precise techniques for measuring time and distance. Satellite navigation
and positioning systems such as the Global Positioning System rely
on atomic clocks. The U.S. National Aeronautics and Space Administration
(NASA) uses atomic clocks to time its transmissions to space probes.
But with the rapid pace of technology development you can have an
atomic time right on your computer clock. Want to know how? Read
our next article about software that synchronizes your computer
clock with atomic one to display the correct current time.
You can now purchase a family license for any of our products. A Family
License allows you to use the product on 3 home computers. Purchasing a
family license gives you three licenses for the price of two.
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