News tagged with wavelength
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 |
(Medical Xpress)—Researchers working at the Weizmann Institute of Science in Israel have discovered that there exists an odor analog of the color white and the sound of white noise. They've been conducting studies on the ...
Psychology & Psychiatry Nov 20, 2012 | 3.7 / 5 (6) | 1 |
(Medical Xpress)—Today saw the launch of Re-Timer, a wearable green light device invented by Flinders University sleep researchers to reset the body's internal clock.
Psychology & Psychiatry Nov 21, 2012 | 5 / 5 (4) | 4 |
The way that the visual centers of men and women's brains works is different, finds new research published in BioMed Central's open access journal Biology of Sex Differences. Men have greater sensitivity to fine detail and ra ...
Neuroscience Sep 03, 2012 | 3.8 / 5 (5) | 11 |
(Medical Xpress)—Researchers in Stanford's Department of Materials Science and Engineering are using models derived in mechanical labs to look closer at how ultraviolet radiation changes the protective ...
Medical research Oct 05, 2012 | 4.7 / 5 (3) | 0 |
Johbu Itoh at the Tokai University School of Medicine in Japan has developed a new and highly effective cancer therapy method where cancer cells are irradiated with ultraviolet C (UVC) light. The new method ...
Cancer Aug 22, 2012 | 5 / 5 (2) | 0
Could a low-cost screening device connected to a cell phone save thousands of women and children from anemia-related deaths and disabilities?
Medical research Jul 24, 2012 | 5 / 5 (1) | 0
The ability of the eye of a fruit fly (Drosophila melanogaster) to respond to light depends on a delicate ballet that keeps the supply of light sensors called rhodopsin constant as photoreceptors turn on and off in respon ...
Neuroscience Dec 04, 2012 | 5 / 5 (1) | 0 |
A new imaging method for the study of insulin-producing cells in diabetes among other uses is now being presented by a group of researchers at Umeå University in Sweden in the form of a video in the biomedical ...
Diabetes Jan 21, 2013 | 5 / 5 (1) | 0
(Medical Xpress)—Two Colorado State University professors have developed a nanostructured surface coating for bone that is expected to help improve the lifetime of bone implants.
Medical research Sep 20, 2012 | 4 / 5 (1) | 0
In physics, the wavelength of a sinusoidal wave is the spatial period of the wave – the distance over which the wave's shape repeats. It is usually determined by considering the distance between consecutive corresponding points of the same phase, such as crests, troughs, or zero crossings, and is a characteristic of both traveling waves and standing waves. Wavelength is commonly designated by the Greek letter lambda (λ). The concept can also be applied to periodic waves of non-sinusoidal shape. The term wavelength is also sometimes applied to modulated waves, and to the sinusoidal envelopes of modulated waves or waves formed by interference of several sinusoids.
Assuming a sinusoidal wave moving at a fixed wave speed, wavelength is inversely proportional to frequency: waves with higher frequencies have shorter wavelengths, and lower frequencies have longer wavelengths.
Examples of wave-like phenomena are sound waves, light, and water waves. A sound wave is a periodic variation in air pressure, while in light and other electromagnetic radiation the strength of the electric and the magnetic field vary. Water waves are periodic variations in the height of a body of water. In a crystal lattice vibration, atomic positions vary periodically in both lattice position and time.
Wavelength is a measure of the distance between repetitions of a shape feature such as peaks, valleys, or zero-crossings, not a measure of how far any given particle moves. For example, in waves over deep water a particle in the water moves in a circle of the same diameter as the wave height, unrelated to wavelength.
For more information about Wavelength, read the full article at
This text uses material from Wikipedia and is available under the GNU Free Documentation License.