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The actual phenomenon that is sometimes called heat lightning is simply cloud-to-ground lightning that occurs very far away, with thunder that dissipates before it reaches the observer. [2] At night, it is possible to see the flashes of lightning from very far distances, up to 100 miles (160 km), but the sound does not carry that far. [3]
A mirage of an astronomical object is a naturally occurring optical phenomenon in which light rays are bent to produce distorted or multiple images of an astronomical object. Mirages can be observed for such astronomical objects as the Sun , the Moon , the planets , bright stars , and very bright comets .
The program is free software, and is intended to reduce eye strain as well as insomnia [3] (see Sleep#Circadian clock and Phase response curve#Light). Redshift transitions the computer display's color temperature evenly between daytime and night temperatures to allow the user's eyes to slowly adapt.
Modern screensavers can turn off the screen when not in use. In many cases, the use of a screensaver is impractical. Most plasma-type display manufacturers include methods for reducing the rate of burn-in by moving the image slightly, [7] which does not eliminate screen burn but can soften the edges of any ghost image that does develop. [8]
Research has found that hotter temperatures at night make it harder to sleep and reduce deep wave and REM sleep, which the body relies on to restore and repair itself overnight.
Image persistence can occur as easily as having something remain unchanged on the screen in the same location for a duration of even 10 minutes, such as a web page or document. Minor cases of image persistence are generally only visible when looking at darker areas on the screen, and usually invisible to the eye during ordinary computer use.
Moving the light off of a dimmer switch may help, but the best thing to do is replace the old incandescent bulb with an energy-saving LED. Trust us, you can find one that replicates its soft ...
[6] [4] Light seems to have therapeutic antidepressant effects when an organism is exposed to it at appropriate times during the circadian rhythm, regulating the sleep-wake cycle. [ 6 ] [ 4 ] In addition to mood, learning and memory become impaired when the circadian system shifts due to light stimuli, [ 6 ] [ 20 ] which can be seen in studies ...