News tagged with light
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 | 5 / 5 (19) | 23 |
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 | 5 / 5 (11) | 7 |
(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 | 5 / 5 (10) | 0 |
(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 | 4.9 / 5 (9) | 12 |
(Medical Xpress) -- From sacred religious texts to books to movies, light and darkness have always symbolized good and evil.
Psychology & Psychiatry Mar 09, 2012 | 4.6 / 5 (9) | 2 |
Every new imaging technology has an aura of magic about it because it suddenly reveals what had been concealed, and makes visible what had been invisible. So, too, with photoacoustic tomography, which is allowing ...
Medical research Mar 22, 2012 | 4.9 / 5 (8) | 0 |
You come into contact every day with light-emitting diodes (LEDs) -- they illuminate alarm clocks, new televisions, traffic lights, and smartphone displays. Increasingly, you will see white-light versions ...
Health Oct 17, 2011 | 4.5 / 5 (8) | 6 |
Discovery of ways to optimize light sources for vision could lead to billions of dollars in energy savings
Vision researchers at Barrow Neurological Institute have made a groundbreaking discovery into the optimization of light sources to human vision. By tuning lighting devices to work more efficiently with the human brain the ...
Neuroscience Nov 15, 2012 | 4.5 / 5 (8) | 3 |
(HealthDay) -- As the United States bakes under the summer sun, dermatologists often warn of cancer risks posed by ultraviolet (UV) sunlight. But research now points to a new and ubiquitous indoor source of the ...
Cancer Aug 03, 2012 | 4.4 / 5 (8) | 7 |
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 | 4.9 / 5 (7) | 0 |
The human eye long ago solved a problem common to both digital and film cameras: how to get good contrast in an image while also capturing faint detail.
Medical research May 03, 2011 | 4.7 / 5 (7) | 1 |
People who like to nap say it helps them focus their minds post a little shut eye. Now, a study from Georgetown University Medical Center may have found evidence to support that notion.
Neuroscience Oct 17, 2012 | 4.4 / 5 (7) | 2 |
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 | 5 / 5 (6) | 0 |
(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 | 4.8 / 5 (6) | 2 |
Chronic exposure to dim light at night can lead to depressive symptoms in rodents -- but these negative effects can be reversed simply by returning to a standard light-dark cycle, a new study suggests.
Psychology & Psychiatry Jul 24, 2012 | 5 / 5 (5) | 0 |
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
This text uses material from Wikipedia and is available under the GNU Free Documentation License.