News tagged with ultraviolet radiation
Mars methane linked to meteorites
Tiny amounts of methane in the Martian atmosphere may come not from living things, but from meteorites on the red planet's surface, the latest findings suggest.
Space & Earth / Space Exploration
May 31, 2012 |
4.7 / 5 (3) |
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Researchers uncover how plant skin is assembled
(Phys.org) -- For the first time, scientists have identified how a plant's skin is assembled.
May 22, 2012 |
5 / 5 (3) |
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Hubble observes a dwarf galaxy with a bright nebula
(Phys.org) -- The NASA/ESA Hubble Space Telescope has made detailed observations of the dwarf galaxy NGC 2366. While it lacks the elegant spiral arms of many larger galaxies, NGC 2366 is home to a bright, ...
May 10, 2012 |
5 / 5 (3) |
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Climatic effects of a solar minimum
An abrupt cooling in Europe together with an increase in humidity and particularly in windiness coincided with a sustained reduction in solar activity 2800 years ago. Scientists from the German Research Centre for Geosciences ...
Space & Earth / Earth Sciences
May 06, 2012 |
4.5 / 5 (13) |
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Safer air-conditioner refrigerant helps reverse rapid ozone-layer losses of past decades
If the approaching summer has you calling for an air-conditioning repair, you'll have a personal experience with one of the world's most successful global environmental efforts.
Apr 04, 2012 |
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Transforming galaxies
(PhysOrg.com) -- Many of the Universe's galaxies are like our own, displaying beautiful spiral arms wrapping around a bright nucleus. Examples in this stunning image, taken with the Wide Field Camera 3 on ...
Feb 13, 2012 |
5 / 5 (5) |
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VLT takes most detailed infrared image of the Carina Nebula
(PhysOrg.com) -- ESO's Very Large Telescope has delivered the most detailed infrared image of the Carina Nebula stellar nursery taken so far. Many previously hidden features, scattered across a spectacular ...
Feb 08, 2012 |
5 / 5 (6) |
3
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A pocket of star formation
(PhysOrg.com) -- This new view shows a stellar nursery called NGC 3324. It was taken using the Wide Field Imager on the MPG/ESO 2.2-metre telescope at the La Silla Observatory in Chile. The intense ultraviolet ...
Feb 01, 2012 |
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Hot cores in dark clouds
(PhysOrg.com) -- The earliest stages in the life of a star are among the most mysterious. This is primarily because stars form inside dark clouds of material that block optical light, and because they form ...
Dec 06, 2011 |
4 / 5 (2) |
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Image: Young stellar grouping in Cygnus X
(PhysOrg.com) -- Cygnus X hosts many young stellar groupings.
Nov 30, 2011 |
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Clearing the cosmic fog of the early universe: Massive stars may be responsible
The space between the galaxies wasn't always transparent. In the earliest times, it was an opaque, dense fog. How it cleared is an important question in astronomy. New observational evidence from the University ...
Oct 12, 2011 |
5 / 5 (5) |
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Astrophysics and extinctions: News about planet-threatening events
Space is a violent place. If a star explodes or black holes collide anywhere in our part of the Milky Way, they'd give off colossal blasts of lethal gamma-rays, X-rays and cosmic rays and it's perfectly reasonable to expect ...
Space & Earth / Space Exploration
Oct 07, 2011 |
4.4 / 5 (8) |
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New technology uses solar UV to disinfect drinking water
(PhysOrg.com) -- A team of Purdue University researchers has invented a prototype water-disinfection system that could help the world's 800 million people who lack safe drinking water.
Sep 29, 2011 |
4.3 / 5 (11) |
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Image: Asteroid caught marching across Tadpole Nebula
(PhysOrg.com) -- This infrared image from NASA's Wide-field Infrared Survey Explorer, or WISE, showcases the Tadpole Nebula, a star-forming hub in the Auriga constellation about 12,000 light-years from Earth. ...
Sep 28, 2011 |
5 / 5 (3) |
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Japan carrier unveils smartphone radiation gauge
Japan's top mobile phone operator NTT DoCoMo is to unveil a smartphone with changeable "jackets" that measure bad breath, body fat and even radiation levels.
Electronics / Consumer & Gadgets
Sep 22, 2011 |
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Ultraviolet
Ultraviolet (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.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
