Light

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Light is electromagnetic radiation, particularly radiation of a wavelength that is visible to the human eye (about 400–700 nm, or perhaps 380–750 nm.) In physics, the term light sometimes refers to electromagnetic radiation of any wavelength, whether visible or not.

Three primary properties of light are:

Light, which exists in tiny "packets" called photons, exhibits properties of both waves and particles. This property is referred to as the wave–particle duality. The study of light, known as optics, is an important research area in modern physics.

For more information about Light, read the full article at Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.


News tagged with light source


First Pump-Probe Experiment at LCLS Completed

First Pump-Probe Experiment at Linac Coherent Light Source Completed

Physics / General Physics

created Nov 30, 2009 | popularity 4.7 / 5 (12) | comments 0

(PhysOrg.com) -- The first experiment using the Linac Coherent Light Source to illuminate molecules via a "pump-probe" technique has been completed by an international team of more than 30 scientists from ...


Part 1: From Linacs to Lasers: Accelerators and Light Sources of Tomorrow

Accelerators and Light Sources of Tomorrow (Part 1: From Linacs to Lasers)

Physics / General Physics

created Dec 22, 2009 | popularity 4.6 / 5 (5) | comments 2

From their humble beginnings as offshoots of the ordinary electric light bulb, particle accelerators have evolved in surprising directions. Among the most productive and promising developments have been light ...





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Genomic Encyclopedia of Bacteria and Archaea (GEBA)

First volume of microbial encyclopedia published

Biology / Cell & Microbiology

created Dec 23, 2009 | popularity 5 / 5 (3) | comments 0

The Earth is estimated to have about a nonillion (1030) microbes in, on, around, and under it, comprised of an unknown but very large number of distinct species. Despite the widespread availability of microbi ...


Accelerators and Light Sources of Tomorrow (Part 2: Accelerating with Light)

Accelerators and Light Sources of Tomorrow (Part 2: Accelerating with Light)

Physics / General Physics

created Dec 22, 2009 | popularity 4.8 / 5 (6) | comments 0

Accelerators are far from achieving the highest energies their builders aspire to, but size and cost may limit the kinds of facilities funding agencies can support. In the future, new kinds of machines will ...


Switchable Nanostructures Made with DNA

Switchable Nanostructures Made with DNA

Nanotechnology / Bio & Medicine

created Dec 21, 2009 | popularity 4.6 / 5 (9) | comments 0

(PhysOrg.com) -- Scientists at the U.S. Department of Energy’s Brookhaven National Laboratory have found a new way to use a synthetic form of DNA to control the assembly of nanoparticles — this time resulting ...


Panasonic Starts Mass-Production of High-Capacity 3.1 Ah Lithium-ion Battery

Technology / Energy

created Dec 18, 2009 | popularity 2 / 5 (2) | comments 3

Panasonic Corporation developed a 18650-type high-capacity 3.1 Ah lithium-ion battery and began mass production of the battery this December. The new 3.1 Ah battery has a nickel positive electrode and an energy density of ...


Studying how black holes grow

Studying how black holes grow

Space & Earth / Space Exploration

created Dec 17, 2009 | popularity 5 / 5 (2) | comments 1

Black holes are some of the most exotic objects in the universe. They are the final evolutionary stage of giant stars much larger than the sun. When these stars explode, their cores collapse down to the size ...


Avatar's moon Pandora could be real

Avatar's moon Pandora could be real

Space & Earth / Astronomy

created Dec 17, 2009 | popularity 4.3 / 5 (27) | comments 10

In the new blockbuster Avatar, humans visit the habitable - and inhabited - alien moon called Pandora. Life-bearing moons like Pandora or the Star Wars forest moon of Endor are a staple of science fiction. ...


Lunar Reconnaissance Orbiter

NASA unveils latest results from lunar mission

Space & Earth / Space Exploration

created Dec 15, 2009 | popularity 4.6 / 5 (5) | comments 0

NASA's current mission in orbit around the moon, the Lunar Reconnaissance Orbiter, or LRO, has been providing crucial insights about our nearest celestial neighbor since its launch in June. At a scientific ...


Miracle light: Can lasers solve the energy crisis?

Technology / Energy

created Dec 15, 2009 | popularity 4.4 / 5 (14) | comments 4

Next year will mark the 50th birthday of the laser, one of the most productive and widely used mega-inventions of the last century. Scientists hope that 2010 also will see the launch of laser technology's greatest challenge: ...


Scientists Investigate Cause of 'Singing Dunes'

Scientists Investigate Cause of 'Singing Dunes'

Physics / General Physics

created Dec 15, 2009 | popularity 4.4 / 5 (21) | comments 7

(PhysOrg.com) -- In more than 30 locations around the world, the phenomenon of singing sand dunes has intrigued explorers, tourists, and scientists. When an avalanche occurs or even when the sand is pushed ...


TRMM sees 05B winding down off the Sri Lanka coast

TRMM sees 05B winding down off the Sri Lanka coast

Space & Earth / Earth Sciences

created Dec 14, 2009 | popularity not rated yet | comments 0

Tropical Depression 05B is dissipating on the east coast of Sri Lanka today and over the next couple of days, but not before bringing some moderate and heavy rain over the next couple of days to some areas ...



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