News tagged with light
'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 |
5 / 5 (19) |
23
|
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 |
5 / 5 (11) |
7
|
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 |
5 / 5 (10) |
0
|
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 |
4.9 / 5 (9) |
12
|
Memories of good, bad deeds can alter perception of brightness
(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
|
Photoacoustic tomography can 'see' in color and detail several inches beneath the skin
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
|
Do white LEDs disrupt our biological clocks?
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
|
Could compact fluorescent bulbs pose skin cancer risk?
(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
|
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 |
4.9 / 5 (7) |
0
|
Why the eye is better than a camera at capturing contrast and faint detail simultaneously
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
|
Might lefties and righties benefit differently from a power nap?
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
|
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 |
5 / 5 (6) |
0
|
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 |
4.8 / 5 (6) |
2
|
Some harmful effects of light at night can be reversed: study
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
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.
