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2006-06-23 00:29:25 · 8 answers · asked by Anonymous in Science & Mathematics Geography

8 answers

The cause of thunder has been the subject of centuries of speculation and scientific enquiry. The first recorded theory is attributed to Aristotle in the third century BC, and an early speculation was that it was caused by the collision of clouds. Subsequently numerous other theories have been proposed. By the mid-19th century, the accepted theory was that lightning produced a vacuum along its path, and that thunder was caused by the subsequent motion of air rushing to fill the vacuum. Later in the 19th century it was believed that thunder was caused by an explosion of steam when water along the lightning channel was heated. Another theory was that gaseous materials were created by lightning and then exploded. In the 20th century a consensus evolved that thunder must begin with a shockwave in the air due to the sudden thermal expansion of the plasma in the lightning channel.

Experimental support for this theory came from spectroscopic temperature measuring up to 36000 Kelvin. Arc photography then proved that the plasma did not expand thermally in all directions, but preferentially at right angles to the electric current. According to Graneau, the mechanism for this is not yet completely understood in terms of magnetohydrodynamics.

2006-06-23 00:48:40 · answer #1 · answered by Anonymous · 0 0

The cause of thunder has been the subject of centuries of speculation and scientific enquiry. The first recorded theory is attributed to Aristotle in the third century BC, and an early speculation was that it was caused by the collision of clouds. Subsequently numerous other theories have been proposed. By the mid-19th century, the accepted theory was that lightning produced a vacuum along its path, and that thunder was caused by the subsequent motion of air rushing to fill the vacuum. Later in the 19th century it was believed that thunder was caused by an explosion of steam when water along the lightning channel was heated. Another theory was that gaseous materials were created by lightning and then exploded. In the 20th century a consensus evolved that thunder must begin with a shockwave in the air due to the sudden thermal expansion of the plasma in the lightning channel.

Experimental support for this theory came from spectroscopic temperature measuring up to 36000 Kelvin. Arc photography then proved that the plasma did not expand thermally in all directions, but preferentially at right angles to the electric current. According to Graneau, the mechanism for this is not yet completely understood in terms of magnetohydrodynamics.

2006-06-27 19:26:31 · answer #2 · answered by Anonymous · 0 0

Tom Cruise.

2006-06-23 04:06:12 · answer #3 · answered by bold4bs 4 · 0 0

when a negatively charged mass (of clouds) cums in contact wid a positively charged 1, then they break thru the air between them and the electrons frm the negatively charged cloud are transferred into the posively charged 1.......this results in the formation of a lot of electric energy wich is coverted into sound energy and light energy.......da sound energy is wt causes the thudersous sound......

2006-06-23 04:17:27 · answer #4 · answered by simrit 1 · 0 0

the rapid expantion and the contraction of air when lighting charges the air.

2006-06-23 00:33:16 · answer #5 · answered by pencilnbrush 6 · 0 0

Ah lightening.

2006-06-23 00:33:37 · answer #6 · answered by bookfreak2day 6 · 0 0

Have you ever heard of the term "google it"

2006-06-23 00:34:06 · answer #7 · answered by mark O 1 · 0 0

when hot air and cold air meets

2006-06-23 00:35:19 · answer #8 · answered by pandiin 2 · 0 0

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