News tagged with light
Tiny wireless injectable LED device shines light on mouse brain, generating reward
Using a miniature electronic device implanted in the brain, scientists have tapped into the internal reward system of mice, prodding neurons to release dopamine, a chemical associated with pleasure.
Neuroscience
Apr 11, 2013 |
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Resetting addicted brain: Laser light zaps away cocaine addiction
By stimulating one part of the brain with laser light, researchers at the National Institutes of Health (NIH) and the Ernest Gallo Clinic and Research Center at UC San Francisco (UCSF) have shown that they ...
Neuroscience
Apr 03, 2013 |
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Shining light in the ears may alleviate SAD symptoms
(Medical Xpress) -- Millions of people experience depression and lower levels of energy in the winter due to seasonal-affective disorder (SAD), or the “winter blues.” Since the disorder is thought ...
Medical research
Mar 07, 2012 |
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New stem cell approach for blindness successful in mice (w/ video)
(Medical Xpress)—Blind mice can see again, after Oxford University researchers transplanted developing cells into their eyes and found they could re-form the entire light-sensitive layer of the retina.
Ophthalmology
Jan 08, 2013 |
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How our sense of touch is a lot like the way we hear
(Medical Xpress)—When you walk into a darkened room, your first instinct is to feel around for a light switch. You slide your hand along the wall, feeling the transition from the doorframe to the painted ...
Neuroscience
Dec 11, 2012 |
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Pill-sized device provides rapid, detailed imaging of esophageal lining
Physicians may soon have a new way to screen patients for Barrett's esophagus, a precancerous condition usually caused by chronic exposure to stomach acid. Researchers at the Wellman Center for Photomedicine ...
Medical research
Jan 13, 2013 |
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Neuroprosthesis gives rats the ability to 'touch' infrared light
Researchers have given rats the ability to "touch" infrared light, normally invisible to them, by fitting them with an infrared detector wired to microscopic electrodes implanted in the part of the mammalian brain that processes ...
Neuroscience
Feb 12, 2013 |
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An 'off' switch for pain: Chemists build light-controlled neural inhibitor
Pain? Just turn it off! It may sound like science fiction, but researchers based in Munich, Berkeley and Bordeaux have now succeeded in inhibiting pain-sensitive neurons on demand, in the laboratory. The crucial element in ...
Medical research
Feb 22, 2012 |
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Medical myth: Reading from a screen harms your eyes
The time most of us spend looking at a screen has rapidly increased over the past decade. If we're not at work on the computer, we're likely to stay tuned into the online sphere via a smart phone or tablet. ...
Health
Oct 19, 2012 |
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Uncovering the genome's regulatory code
Since the sequencing of the human genome in 2001, all our genes – around 20,000 in total – have been identified. But much is still unknown – for instance where and when each is active. Next to each ...
Genetics
Sep 10, 2012 |
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Optical Illusion experiment shows higher brain functions involved in pupil size control
(Medical Xpress) -- We all know that our pupils contract when our eyes are exposed to increases in the brightness of light. The reason is to both protect the delicate inner workings of our eyes and to help ...
Neuroscience
Jan 25, 2012 |
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Reseachers develop holographic technique for bionic vision
Researchers led by biomedical engineering Professor Shy Shoham of the Technion-Israel Institute of Technology are testing the power of holography to artificially stimulate cells in the eye, with hopes of ...
Medical research
Feb 26, 2013 |
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Protecting genes, one molecule at a time
An international team of scientists have shown at an unprecedented level of detail how cells prioritise the repair of genes containing potentially dangerous damage. The research, published in the journal Nature and involv ...
Genetics
Sep 09, 2012 |
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Switching night vision on or off
Neurobiologists at the Friedrich Miescher Institute have been able to dissect a mechanism in the retina that facilitates our ability to see both in the dark and in the light. They identified a cellular switch ...
Neuroscience
Mar 27, 2013 |
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'White' light suppresses the body's production of melatonin
Exposure to the light of white LED bulbs, it turns out, suppresses melatonin 5 times more than exposure to the light of High Pressure Sodium bulbs that give off an orange-yellow light. "Just as there are regulations and standards ...
Health
Sep 12, 2011 |
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Light
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.
