The NIST-F4 atomic clock, a new high-precision timekeeper developed by the National Institute of Standards and Technology (NIST) in Boulder, Colorado, uses cesium atoms to keep official U.S. time. Utilizing advanced laser-cooling techniques, cesium atoms oscillate in frequency over 9 billion times per second, ensuring exceptional accuracy. This clock could only be off by less than a second over a period of 100 million years. Certified by the International Bureau of Weights and Measures, NIST-F4 plays a crucial role in calibrating the coordinated universal time (UTC) and offers significant reliability for timekeeping in the U.S.
The NIST-F4 atomic clock, which uses cesium atoms oscillating over 9 billion times per second, is now officially keeping U.S. time with remarkable accuracy.
Researchers emphasize that the NIST-F4 clock is so precise it would only lose a second over a span of 100 million years, showcasing its reliability.
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