The US Department of Homeland Security revealed to AFP on Tuesday new technical details regarding its highly anticipated study into how ultraviolet radiation destroys the new coronavirus, saying that its experiment had accurately ...
Apr 29, 2020
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Those fluorescent lights hanging above your cubicle might be making you sick, depressed and obese, according to ex-NASA scientist Robert Soler.
Jan 28, 2019
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Sunlight allows us to make vitamin D, credited with healthier living, but a surprise research finding could reveal another powerful benefit of getting some sun.
Dec 20, 2016
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A team of researchers affiliated with several institutions in the U.S. has found that office workers sleep more hours each night when exposed to more sunlight during the day. In their paper published in the International ...
(Medical Xpress) -- Aberdeen scientists have demonstrated for the first time a clear link between sunlight, vitamin D and an impact on regulatory cells in the immune system in findings that might provide new insights into ...
Jul 18, 2012
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Previously published solar exposure guidelines for optimal vitamin D synthesis based on a study of skin samples may need to be revised, according to new research published today in PNAS.
Sep 27, 2021
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Current evidence does not support the use of vitamin D supplements to prevent disease, conclude researchers in The BMJ today.
Nov 23, 2016
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Exposure to moderate amounts of sunshine may slow the development of obesity and diabetes, a study suggests.
Oct 23, 2014
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(Medical Xpress) -- New research from the Children of the 90s study at the University of Bristol, which has been charting the health of 14,500 children since their birth in the early 1990s, shows that the link between low ...
Jan 20, 2012
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Adolescents are risking their bone health because they have low levels of vitamin D, new research with schoolchildren in Manchester has shown.
Aug 3, 2016
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Sunlight, in the broad sense, is the total spectrum of the electromagnetic radiation given off by the Sun. On Earth, sunlight is filtered through the atmosphere, and the solar radiation is obvious as daylight when the Sun is above the horizon. Near the poles in summer, the days are longer and the nights are shorter or non-existent. In the winter at the poles the nights are longer and for some periods of time, sunlight may not occur at all. When the direct radiation is not blocked by clouds, it is experienced as sunshine, a combination of bright light and heat. Radiant heat directly produced by the radiation of the sun is different from the increase in atmospheric temperature due to the radiative heating of the atmosphere by the sun's radiation. Sunlight may be recorded using a sunshine recorder, pyranometer or pyrheliometer. Sunlight takes about 8.3 minutes to reach the Earth. The World Meteorological Organization defines sunshine as direct irradiance from the Sun measured on the ground of at least 120 watts per square metre.
Direct sunlight has a luminous efficacy of about 93 lumens per watt of radiant flux, which includes infrared, visible, and ultra-violet light. Bright sunlight provides luminance of approximately 100,000 candela per square meter at the Earth's surface.
Sunlight is a key factor in photosynthesis, a process crucially important for life on Earth.
This text uses material from Wikipedia, licensed under CC BY-SA
