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Cloud-to-ground lightning. Typically, lightning discharges 30,000 amperes, at up to 100 million volts, and emits light, radio waves, x-rays and even gamma rays. [1] Plasma temperatures in lightning can approach 28,000 kelvins. Atmospheric electricity describes the electrical charges in the Earth's atmosphere (or that of another planet).
Cloud-to-ground (CG) lightning is either positive or negative, as defined by the direction of the conventional electric current between cloud and ground. Most CG lightning is negative, meaning that a negative charge is transferred (electrons flow) downwards to ground along the lightning channel (conventionally speaking they flow from the ground ...
Sympathetic lightning is the tendency of lightning to be loosely coordinated across long distances. Discharges can appear in clusters when viewed from space. [22] [23] [24] [clarification needed] Upward lightning or ground-to-cloud lightning is a lightning flash which originates from the top of a grounded object and propagates upward from this ...
Benjamin Franklin Drawing Electricity from the Sky is a c. 1805 painting by Benjamin West in the Philadelphia Museum of Art. [1] It depicts American Founding Father Benjamin Franklin conducting his kite experiment in 1752 to ascertain the electrical nature of lighting. West composed his 13.25 in × 10 in (33.7 cm × 25.4 cm) work using oil on a ...
A more complete account of Franklin's experiment was given by Priestley in 1767, who presumably learned the details directly from Franklin, who was in London while Priestley wrote the book. [ 6 ] According to the 1767 Priestley account, Franklin realized the dangers of using conductive rods and instead used the conductivity of a wet hemp string ...
A lightning-struck tree in the Toronto Islands, clearly shows the path that the charge took into the ground. Trees are frequent conductors of lightning to the ground. [27] Since sap is a relatively poor conductor, its electrical resistance causes it to be heated explosively into steam, which blows off the bark outside the lightning's path. In ...
A photographer was recording the sunset when lightning struck. Watch lightning crawl ‘all over the sky’ off new Outer Banks bridge in North Carolina Skip to main content
A lightning strike can also create a large Lichtenberg figure in grass surrounding the point struck. These are sometimes found on golf courses or in grassy meadows. [ 12 ] Branching root-shaped " fulgurite " mineral deposits may also be created as sand and soil are fused into glassy tubes by the intense heat of the current.