Ultraviolet
hideUltraviolet (UV) light is electromagnetic radiation with a wavelength shorter than that of visible light, but longer than x-rays, in the range 10 nm to 400 nm, and energies from 3 eV to 124 eV. It is so named because the spectrum consists of electromagnetic waves with frequencies higher than those that humans identify as the color violet.
UV light is found in sunlight and is emitted by electric arcs and specialized lights such as black lights. As an ionizing radiation it can cause chemical reactions, and causes many substances to glow or fluoresce. Most people are aware of the effects of UV through the painful condition of sunburn, but the UV spectrum has many other effects, both beneficial and damaging, on human health.
For more information about Ultraviolet, read the full article at
Wikipedia.
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News tagged with ultraviolet light
Grant to Design Neutrino Detector
Oct 14, 2009 |
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(PhysOrg.com) -- A consortium led by UC Davis physics professor Robert Svoboda will design the world's largest neutrino detector under a $4.4 million contract recently awarded by the National Science Foundation.
'Anti-swine flu' business suit on sale in Japan
Oct 09, 2009 |
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A Japanese menswear company has begun selling an "anti-swine flu" business suit that it says can reduce the risk of catching the virus.
New nanostructure technology provides advances in eyeglass, solar energy performance
Nanotechnology / Nanomaterials
Sep 16, 2009 |
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(PhysOrg.com) -- Chemical engineers at Oregon State University have invented a new technology to deposit "nanostructure films" on various surfaces, which may first find use as coatings for eyeglasses that ...
Scientists unravel the chemistry of Titan's hazy atmosphere
Space & Earth / Space Exploration
Sep 15, 2009 |
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A team of University of Hawai'i at Mānoa researchers led by Ralf Kaiser, physical chemist at UH Mānoa, unraveled the chemical evolution of the orange-brownish colored atmosphere of Saturn's moon ...
Toward a nanomedicine for brain cancer
Nanotechnology / Bio & Medicine
Sep 09, 2009 |
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In an advance toward better treatments for the most serious form of brain cancer, scientists in Illinois are reporting development of the first nanoparticles that seek out and destroy brain cancer cells without ...
Bananas Gone Bad Glow Blue in UV-Light
Sep 09, 2009 |
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(PhysOrg.com) -- Nicholas Turro of Columbia University, Bernhard Krautler of the University of Innsbruck, Austria and their colleagues have found that, as chlorophyll ages and begins to disintegrate in banana ...
Massive Stars Near the Galactic Center
Aug 28, 2009 |
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The Central Molecular Zone (CMZ) of our galaxy is a giant complex of molecular gas and dust situated in the innermost 700 light-years of the Milky Way. Although the galaxy is over 100,000 light-years in size, ...
Nuclear fusion research key to advancing computer chips
Aug 18, 2009 |
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(PhysOrg.com) -- Researchers are adapting the same methods used in fusion-energy research to create extremely thin plasma beams for a new class of "nanolithography" required to make future computer chips.
Scientists discovers 'firework' display in Helix Nebula
Jul 20, 2009 |
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(PhysOrg.com) -- A star does not die without getting noticed and may even leave the universe with "fireworks." At the end of its life cycle, a star begins to collapse in the middle and throws new material ...
Scientists Shed 'Light' on Semiconductor Quandry
Jul 14, 2009 |
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(PhysOrg.com) -- UC San Diego scientists are using laser plasma-produced light sources to explore performance improvements of critical inspection tools for the semiconductor industry, which ultimately will ...
The Medical Minute: Melanoma - The dark side of the sun
May 27, 2009 |
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Now that the weather is nice, people will spend more time outside. Whether it’s doing yard work, playing golf or relaxing at the beach, we are a nation of sun lovers. Some people with light skin may even spend a few sessions ...
DNA molecules can detect pathogens, deliver drugs
Nanotechnology / Bio & Medicine
May 20, 2009 |
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(PhysOrg.com) -- First, Cornell researchers created DNA "bar codes" -- strands of the genetic material that quickly identify the presence of different molecules by fluorescing. Now, they have created new DNA ...
SKorean experts claim to have cloned glowing dogs
Apr 28, 2009 |
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(AP) -- South Korean scientists say they have engineered four beagles that glow red using cloning techniques that could help develop cures for human diseases. The four dogs, all named "Ruppy" - a combination ...
Presto! Fast color-changing material may lead to more powerful computers (w/Video)
Apr 23, 2009 |
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(PhysOrg.com) -- Researchers in Japan are reporting development of a new so-called "photochromic" material that changes color thousands of times faster than conventional materials when exposed to light.
Pillars of Creation formed in the shadows
Apr 23, 2009 |
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Research by astronomers at the Dublin Institute of Advanced Studies suggests that shadows hold the key to how giant star-forming structures like the famous "Pillars of Creation" take shape.
