What is an atomic clock ? Where it is kept?
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Atomic clocks are used to coordinate systems that require extreme precision, such as Global Positioning System ( GPS ) navigation and the Internet. A group of atomic clocks located in a number of places throughout the world is used in conjunction to establish Coordinated Universal Time ( UTC ).
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Answer:
an extremely accurate type of clock which is regulated by the vibrations of an atomic or molecular system such as caesium or ammonia
Explanation:
used as primary standards for international time distribution services, to control the wave frequency of television broadcasts, and in global navigation satellite systems such as GPS.
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