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Atomic clock: Difference between revisions

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→‎Strontium: unsourced, no main article. Nothing for nearly a year so removing.
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Hydrogen masers are used for flywheel oscillators in laser-cooled atomic frequency standards and broadcasting time signals from national standards laboratories, although they need to be corrected as they drift from the correct frequency over time. The hydrogen maser is also useful for experimental tests of the effects of [[special relativity]] and [[general relativity]] such as [[gravitational red shift]].<ref name=":9" />
 
=== Strontium ===
{{expand section|date=August 2023}}
 
A few types of strontium atomic clocks exist, including optical clocks.<!--already sourced above, needs copyediting -->
 
==Time measuring mechanism==