News tagged with ultraviolet light
Will 3-D printing launch a new industrial revolution?
Peter Schmitt, an MIT doctoral student, printed a clock in 2009. He didn't print an image of a clock on a piece of paper. He printed a three-dimensional clock -- an eight-inch diameter plastic timekeeping ...
Apr 13, 2012 |
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Clearing the cosmic fog: The most distant galaxy ever measured (w/ Video)
(PhysOrg.com) -- A European team of astronomers using ESO's Very Large Telescope (VLT) has measured the distance to the most remote galaxy so far. By carefully analysing the very faint glow of the galaxy they ...
Oct 20, 2010 |
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Researchers discover how key enzyme repairs sun-damaged DNA
Researchers have long known that humans lack a key enzyme -- one possessed by most of the animal kingdom and even plants -- that reverses severe sun damage.
Medicine & Health / Medical research
Jul 25, 2010 |
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Giant ultraviolet rings found in resurrected galaxies
Astronomers have found mysterious, giant loops of ultraviolet light in aged, massive galaxies, which seem to have a second lease on life. Somehow these "over-the-hill galaxies" have been infused with fresh ...
Aug 11, 2010 |
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Microbes survive a year and a half in space
(PhysOrg.com) -- Bacteria collected from rocks taken from the cliffs at the tiny English fishing village of Beer in Devon, have survived on the outside surface of the International Space Station for 553 days. ...
Space & Earth / Space Exploration
Aug 25, 2010 |
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Shaking the Fundamentals of Physics: At the Limits of the Photoelectric Effect
With extremely short wavelengths and very high intensities, light-matter interaction seems to be different than previously accepted.
Apr 24, 2009 |
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Presto! Fast color-changing material may lead to more powerful computers (w/Video)
(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.
Apr 23, 2009 |
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Temporal coherence: Future laser technology reaches new era
Even as the Linac Coherent Light Source delivers X-rays with unprecedented power, marking a new era of X-ray science, a team of SLAC researchers is working to make such X-ray lasers even better. In a paper ...
Sep 13, 2010 |
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Japan scientist makes violin strings from spider silk
A Japanese scientist said he has made violin strings out of spider silk and claims that -- in the right hands -- they produce a beautiful sound.
Mar 06, 2012 |
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Astronomers observe fast growing primitive black holes
(PhysOrg.com) -- Astronomers have come across what appear to be two of the earliest and most primitive supermassive black holes known. The discovery, based largely on observations from NASA's Spitzer Space ...
Mar 17, 2010 |
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Scientists watch chemical bond break using molecule's electrons
Scientists at the National Research Council of Canada (NRC) and the University of Ottawa (uOttawa) enjoyed a bird's eye view of a chemical bond as it breaks.
Jul 28, 2010 |
4.9 / 5 (14) |
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Sensor measures yoctonewton forces fast
(PhysOrg.com) -- Physicists at the National Institute of Standards and Technology have used a small crystal of ions (electrically charged atoms) to detect forces at the scale of yoctonewtons. Measurements ...
Sep 01, 2010 |
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Jefferson Lab laser twinkles in rare color
December is a time for twinkling lights, and scientists at the Department of Energy's Thomas Jefferson National Accelerator Facility are delivering. They've just produced a long-sought, rare color of laser light 100 times ...
Dec 21, 2010 |
4.7 / 5 (13) |
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Massive Stars Near the Galactic Center
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, ...
Aug 28, 2009 |
4.3 / 5 (14) |
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Researchers unravel the mystery of quantum dot blinking
(PhysOrg.com) -- Research by Los Alamos scientists published today in the journal Nature documents significant progress in understanding the phenomenon of quantum-dot blinking. Their findings should enhanc ...
Nov 09, 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.
