News tagged with laser frequency
A fine-tooth comb to measure the accelerating universe
Sep 04, 2008 |
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Astronomical instruments needed to answer crucial questions, such as the search for Earth-like planets or the way the Universe expands, have come a step closer with the first demonstration at the telescope ...
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New Research Promises Better Atomic Clocks
Apr 22, 2009 |
4.7 / 5 (9) |
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(PhysOrg.com) -- The most accurate timekeepers in the world are atomic clocks, which tell time based on the absorption of a very specific and unchanging microwave frequency, which induces electrons in an atom to “jump” from ...
Greek pilots see red from laser pen pranks
Aug 19, 2009 |
3 / 5 (2) |
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Greece's civil aviation pilots on Wednesday called for a crackdown on laser pen pranksters who have endangered a growing number of plane landings around the country.
A sonic boom in the world of lasers
Jun 17, 2009 |
4.8 / 5 (22) |
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It was an idea born out of curiosity in the physics lab, but now a new type of ‘laser’ for generating ultra-high frequency sound waves instead of light has taken a major step towards becoming a unique and highly useful 21st ...
Optical Atomic Clock: A long look at the captured atoms
Feb 05, 2008 |
4.3 / 5 (12) |
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Optical clocks might become the atomic clocks of the future. Their "pendulum", i.e. the regular oscillation process which each clock needs, is an oscillation in the range of the visible light. As its frequency is higher than ...
Scientists Build Anti-Mosquito Laser
Mar 16, 2009 |
4.5 / 5 (37) |
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(PhysOrg.com) -- In an effort to prevent the spread of malaria, scientists have built a laser that shoots and kills mosquitoes. Malaria, which is caused by a parasite and transmitted by mosquitoes, kills about ...
Terahertz laser source at room temperature
Jun 03, 2008 |
4.6 / 5 (41) |
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“There is a growing interest in utilizing terahertz radiation, or T-rays, for a variety of applications,” Mikhail Belkin, a scientist at Harvard University, tells PhysOrg.com. “The terahertz region is a part of the electr ...
Atomic fountain clocks are becoming still more stable
Mar 18, 2009 |
4 / 5 (1) |
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They are at present the most accurate clocks in the world: Caesium fountain clocks furnish the second accurate to 15 places after the decimal point. Until they reach this accuracy, caesium fountain clocks, however, need a ...
Scientists in Japan design first optical pacemaker for laboratory research
May 28, 2008 |
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The world's first optical pacemaker is described in an article published today in Optics Express, the Optical Society’s open-access journal. A team of scientists at Osaka University in Japan show that powerful, but very s ...
Scientists Build First 'Frequency Comb' To Display Visible 'Teeth'
Oct 29, 2009 |
4.9 / 5 (15) |
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(PhysOrg.com) -- Finally, an optical frequency comb that visibly lives up to its name. Scientists at the University of Konstanz in Germany and the National Institute of Standards and Technology in the U.S. ...
Record-setting Laser May Aid Searches for Earthlike Planets
May 05, 2008 |
4.6 / 5 (45) |
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Scientists at the University of Konstanz in Germany and the National Institute of Standards and Technology (NIST) have demonstrated an ultrafast laser that offers a record combination of high speed, short ...
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