New Microsoft Word Document (3)

New Microsoft Word Document (3) - Lightning Lightning is an...

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Lightning Lightning is an atmospheric discharge of electricity accompanied by thunder, which typically occurs during thunderstorms, and sometimes during volcanic eruptions or dust storms High speed videos (examined frame-by frame) show that most lightning cloud- strikes are made up of multiple individual strokes. A typical strike is made of 3 to 4 strokes. There may be more. Each re-strike is separated by a relatively large amount of time, typically 40 to 50 milliseconds. Re-strikes can cause a noticeable "strobe light" effect The irrational fear of lightning (and thunder) is astraphobia. The study or science of lightning is called fulminology, and someone who studies lightning is referred to as a fulminologist. . There are some 16 million lightning storms in the world every year.75% of these flashes are either cloud-to-cloud or intra-cloud and 25% are to-ground Properties An average bolt of negative lightning carries an electric current of 30,000 amperes ("amps") — 30 "kiloamps" (kA), and transfers five coulombs of electric charge and 500 million joules — 500 "megajoules" (MJ) of energy Large bolts of lightning can carry up to 120 kA and 350 coulombs Types There are various types of lightning; scientists and the general public have given
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This note was uploaded on 04/16/2011 for the course EEE 30 taught by Professor Dr.sohrabuddin during the Spring '11 term at American Intl. University.

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New Microsoft Word Document (3) - Lightning Lightning is an...

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