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+ By Nisavac Wallpapers
- Easy-to-browse interface enables you to find the desired wallpaper in no time!
- Customize the wallpaper to fit your taste and screen!
- Zoom, un-zoom, rotate, move, scale, adjust brightness, add various effects and save your background design!
Have you ever looked to the sky during a storm and wondered what lightning is? Well, it is an atmospheric discharge of electricity that is frequently accompanied by thunder when it occurs during a thunderstorm. It can occur during volcanic eruptions and dust storms. The front end of a bolt can travel 60,000 m/s and reach 30,000°C.
It can have a positive or negative charge. It is overwhelmingly negative. An average bolt of negative charge carries a current 30,000 amperes (amps). Large bolts can carry up to120,000 amps. Positive charge has about 3,000,000 amps. It rapidly heats the air in its immediate vicinity to about 20,000°C which is about three times the temperature of the Sun’s surface. This compresses the surrounding clear air and creates a supersonic shock wave that decays and becomes an acoustic wave that we call thunder. It sounds so powerful right? So make your screen different and powerful as well with a collection of backgrounds related to this amazing natural occurrence.
It is good to know that after it travels to the ground or another cloud, it may strike again several times within a fraction of a second. These re-strikes are so fast that people cannot register them with the naked eye; instead, they appear as a single strike. The electricity moves so quickly that it superheats the surrounding air, causing a sudden rapid expansion that creates a shockwave. Shockwaves are responsible for thunder; because thunder is so closely associated, some people attempt to judge the distance of a storm by counting the time which elapses between a strike and a thunderclap.
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