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Home » Instrumentation and measurement » Metrology » New definition of second ticks closer after international optical-clock comparison

New definition of second ticks closer after international optical-clock comparison

02 Jul 2025
Photograph of optical fibres
Bright idea Optical fibres are playing a crucial role in the comparison of optical clocks. (Courtesy: istock/morepixels)
Atomic clocks are crucial to many modern technologies including satellite navigation and telecoms ne

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Martijn Boerkamp is a science writer based in the Netherlands
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