News tagged with light intensity
A new generation of acoustic measurements
NPL scientists have made the first measurements of airborne acoustic free-field pressures using a laser technique based on photon correlation spectroscopy.
May 29, 2012 |
not rated yet |
0
A magnetic approach to lattices
(Phys.org) -- JQI experimentalists under the direction of Ian Spielman are in the business of using lasers to create novel environments for neutral atoms. For instance, this research group previously enticed ...
May 22, 2012 |
5 / 5 (4) |
0
|
Scientists move objects across meter-scale distances using only light (w/ Video)
(PhysOrg.com) -- For more than 40 years, scientists have been using the radiation pressure of light to move and manipulate small objects in space. But until now, the movements have always been restricted to ...
Sep 30, 2010 |
4.8 / 5 (36) |
10
|
Cantilever bends repeatedly under light exposure for continuous energy generation
(PhysOrg.com) -- With the goal to enable small electronic devices to harvest their own energy, researchers have designed a device that can convert light and thermal energy into electricity. When exposed to ...
Oct 05, 2010 |
4.9 / 5 (20) |
10
|
Extraordinary light enhancement technique proposed for nanophotonic devices
(PhysOrg.com) -- In a new study, scientists have shown that simply tailoring the nanoscale geometrical parameters of dielectric structures can result in an increase in the light intensity to unprecedented levels. Theoretically, ...
Nov 03, 2010 |
4.7 / 5 (13) |
0
|
Chandra finds nearest pair of supermassive black holes
(PhysOrg.com) -- Astronomers have used NASA's Chandra X-ray Observatory to discover the first pair of supermassive black holes in a spiral galaxy similar to the Milky Way. At a distance of 160 million light ...
Aug 31, 2011 |
5 / 5 (7) |
4
|
Nano antenna concentrates light: Intensity increases 1,000-fold
(PhysOrg.com) -- Everybody who's ever used a TV, radio or cell phone knows what an antenna does: It captures the aerial signals that make those devices practical. A lab at Rice University has built an antenna ...
Sep 20, 2010 |
4.9 / 5 (21) |
6
|
Researchers discover mechanism that helps humans see in bright and low light
Ever wonder how your eyes adjust during a blackout? When we go from light to near total darkness, cells in the retina must quickly adjust. Vision scientists at Washington University School of Medicine in St. ...
Medicine & Health / Neuroscience
Oct 13, 2009 |
4.9 / 5 (9) |
0
Suspects in the quenching of star formation exonerated
Supermassive black holes millions to billions times the mass of our Sun lie at the heart of most, maybe all large galaxies. Some of these power brilliantly luminous, rapidly growing objects called active galactic nuclei that ...
Oct 11, 2011 |
4.4 / 5 (5) |
2
|
Fruit fly larvae detect light via body's network of photoreceptors
(PhysOrg.com) -- New research in the U.S. has discovered that fruit fly larvae have a series of photoreceptors covering the body that can detect light even when their primitive "eyes" are covered or removed.
Nov 12, 2010 |
4.2 / 5 (5) |
0
|
Study says nocturnal ants have evolved night vision
(PhysOrg.com) -- Researchers studying the eyes of different Australian bull ants have found the first evidence of adaptation of visual structures within a single species to distinct light intensities.
Oct 06, 2010 |
4.3 / 5 (4) |
4
|
Tying the knot with computer-generated holograms: Winding optical path moves matter
In the latest twist on optical knots, New York University physicists have discovered a new method to create extended and knotted optical traps in three dimensions. This method, which the NYU scientists describe ...
Mar 15, 2011 |
4.7 / 5 (7) |
0
|
Even the midnight sun won't convince bees to work nights
Bees observe a strict working day, even in conditions of 24-hour sunlight. Researchers writing in the open access journal BMC Biology tagged worker bumblebees with a radio identifier, similar to an Oyster ...
Jun 28, 2010 |
4.5 / 5 (2) |
0
|
Detecting clouds from both sides now
Researchers have developed a more precise method to detect the boundary between clouds and clear air, by exploiting the swinging motions of a weather balloon and its payload.
Space & Earth / Earth Sciences
Mar 13, 2012 |
not rated yet |
0
The Tarantula glows with X-rays and infrared light
(PhysOrg.com) -- This spiderweb-like tangle of gas and dust is a star-forming region called 30 Doradus. It is one of the largest such regions located close to the Milky Way galaxy, and is found in the neighboring ...
Nov 11, 2011 |
4.5 / 5 (2) |
4
