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World’s most accurate clock requires a 2-mile laser beam
However, aluminum is tricky. The element is difficult to measure with lasers, as well as cool to absolute zero. But when ...
World's most precise clock achieves 19-decimal accuracy with aluminum ion technology
There's a new record holder for the most accurate clock in the world. Researchers at the National Institute of Standards and ...
Interesting Engineering on MSN8 小时
World’s most accurate atomic clock uses 2-mile laser beam to track time precisely
The laser beam traveled 3.6 kilometers (over 2 miles) via fiber optic links to NIST, where a frequency comb (acting as a “ruler for light”) allowed the aluminum ion clock’s laser to adopt its superior ...
Intercontinental optical clock comparison sets stage to redefine the second
In the final analysis, by showing that 10 heterogenous clocks across three continents could agree with each other to within a ...
Physics World12 天
New definition of second ticks closer after international optical-clock comparison
“The optical clock community is strongly motivated to obtain the best possible set of measurements before the SI second is ...
Watching the world, one quintillionth of a second at a time
Knowable Magazine reports on attosecond science, revealing how scientists study atomic interactions at unbelievable speeds to ...
Earth's faster spin may cause shorter days, scientists warn — should you be concerned
Earth's rotation is speeding up, leading to shorter days and potential timekeeping adjustments. Scientists predict that by ...