News tagged with optical frequency

Quantum kisses change the color of nothing

Even empty gaps have a colour. Now scientists have shown that quantum jumps of electrons can change the colour of gaps between nano-sized balls of gold. The new results, published today in the journal Nature, set a ...

Nov 07, 2012
4.8 / 5 (14) 0 | with audio podcast

Super-massive black hole inflates giant bubble

Like symbiotic species, a galaxy and its central black hole lead intimately connected lives. The details of this relationship still pose many puzzles for astronomers. Some black holes actively accrete matter. ...

Oct 29, 2012
4.9 / 5 (15) 108 | with audio podcast

Explained: Femtoseconds and attoseconds

Back in the first half of the 20th century, when MIT's famed Harold "Doc" Edgerton was perfecting his system for capturing fast-moving events on film, the ability to observe changes unfolding at a scale of ...

Sep 18, 2012
4.3 / 5 (4) 0

Atomic clock comparison via data highways

(Phys.org) -- Optical atomic clocks measure time with unprecedented accuracy. However, it is the ability to compare clocks with one another that makes them applicable for high-precision tests in fundamental ...

Apr 27, 2012
not rated yet 3 | with audio podcast

The tick-tock of the optical clock

(PhysOrg.com) -- UK's National Physical Laboratory time scientists have made an accurate measurement of the highly forbidden octupole transition frequency in an ytterbium ion, which could be used as the basis ...

Mar 29, 2012
3.9 / 5 (11) 3 | with audio podcast