A team of researchers at the University of Western Australia has set a record for stability when sending a laser beam across an atmospheric distance. The group describes their laser system in the journal Physical Review Letters.
In less than 24 hours the Bulletin of the Atomic Scientists will update the Doomsday Clock. It's currently at 100 seconds from midnight—the metaphorical time when the human race could destroy the world with technologies ...
Environment
Jan 20, 2022
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93
Ultra-precise lasers can be used for optical atomic clocks, quantum computers, power cable monitoring, and much more. But all lasers make noise, which researchers from DTU Fotonik want to minimize using machine learning.
Optics & Photonics
Jan 03, 2022
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182
Laser beams can do more than just heat things up; they can cool them down too. That is nothing new for physicists who have devoted themselves to precision spectroscopy and the development of optical atomic clocks. But what ...
Quantum Physics
Dec 13, 2021
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439
Cooled to almost absolute zero, atoms not only move in waves like light but also can be focused into shapes called caustics, similar to the reflecting or refracting patterns light makes on the bottom of a swimming pool or ...
Quantum Physics
Dec 10, 2021
1
464
It's no secret that jet lag and night-shift work can wreak havoc on the way our body's internal clock syncs up our daily wake-sleep cycle, known as circadian rhythm, but now researchers say they are a step closer to understanding ...
Molecular & Computational biology
Nov 30, 2021
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140
While the Doomsday Clock is perilously close to midnight, it is not as close as UK Prime Minister Boris Johnson recently suggested in his COP26 opening remarks.
Environment
Nov 03, 2021
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76
A team of researchers at the JILA, National Institute of Standards and Technology at the University of Colorado has found a way to use an atomic clock to demonstrate a principle of general relativity. The team has published ...
Daily cycles in virtually every aspect of our physiology are driven by biological clocks (also called circadian clocks) in our cells. The cyclical interactions of clock proteins keep the biological rhythms of life in tune ...
Molecular & Computational biology
Oct 07, 2021
0
301
For more than two years, NASA's Deep Space Atomic Clock has been pushing the timekeeping frontiers in space. On Sept. 18, 2021, its mission came to a successful end.
Space Exploration
Oct 05, 2021
6
106
A clock is an instrument used to indicate, keep, and co-ordinate time. The word clock is derived ultimately (via Dutch, Northern French, and Medieval Latin) from the Celtic words clagan and clocca meaning "bell". A silent instrument missing such a mechanism has traditionally been known as a timepiece. In general usage today a "clock" refers to any device for measuring and displaying the time. Watches and other timepieces that can be carried on one's person are often distinguished from clocks.
The clock is one of the oldest human inventions, meeting the need to consistently measure intervals of time shorter than the natural units: the day; the lunar month; and the year. Devices operating on several different physical processes have been used over the millennia, culminating in the clocks of today.
This text uses material from Wikipedia, licensed under CC BY-SA
