what is the reason behind thunder and lightning
Answers
Answer:
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Explanation:
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Answer:
When a lightning bolt travels from the cloud to the ground it actually opens up a little hole in the air, called a channel. Once then light is gone the air collapses back in and creates a sound wave that we hear as thunder. The reason we see lightning before we hear thunder is because light travels faster than sound!
Explanation:
he cause of thunder has been the subject of centuries of speculation and scientific inquiry.[5] Early thinking was that it was made by deities but the ancient Greek philosophers attributed it to natural causes, such as wind striking clouds (Anaximander, Aristotle) and movement of air within clouds (Democritus).[6] The Roman philosopher, Lucretius held it was from the sound of hail colliding within clouds.[6]
By the mid-19th century, the accepted theory was that lightning produced a vacuum; the collapse of that vacuum produced thunder.[5]
In the 20th century a consensus evolved that thunder must begin with a shock wave in the air due to the sudden thermal expansion of the plasma in the lightning channel.[7][6] The temperature inside the lightning channel, measured by spectral analysis, varies during its 50 μs existence, rising sharply from an initial temperature of about 20,000 K to about 30,000 K, then dropping away gradually to about 10,000 K. The average is about 20,400 K (20,100 °C; 36,300 °F).[8] This heating causes a rapid outward expansion, impacting the surrounding cooler air at a speed faster than sound would otherwise travel. The resultant outward-moving pulse is a shock wave,[9] similar in principle to the shock wave formed by an explosion, or at the front of a supersonic aircraft.
Experimental studies of simulated lightning have produced results largely consistent with this model, though there is continued debate about the precise physical mechanisms of the process.[10][7] Other causes have also been proposed, relying on electrodynamic effects of the massive current acting on the plasma in the bolt of lightning.[11]
Lightning is a naturally occurring electrostatic discharge during which two electrically charged regions in the atmosphere or ground temporarily equalize themselves, causing the instantaneous release of as much as one gigajoule of energy.[1][2][3] This discharge may produce a wide range of electromagnetic radiation, from very hot plasma created by the rapid movement of electrons to brilliant flashes of visible light in the form of black-body radiation. Lightning causes thunder, a sound from the shock wave which develops as gases in the vicinity of the discharge experience a sudden increase in pressure. Lightning occurs commonly during thunderstorms and other types of energetic weather systems.
The three main kinds of lightning are distinguished by where they occur: either inside a single thundercloud, between two different clouds, or between a cloud and the ground. Many other observational variants are recognized, including "heat lightning", which can be seen from a great distance but not heard; dry lightning, which can cause forest fires; and ball lightning, which is rarely observed scientifically.
Humans have deified lightning for millennia, and lightning-inspired expressions like "bolt from the blue", "to be struck by lightning" (as to having an epiphany or enlightenment), "lightning never strikes twice (in the same place)" and "blitzkrieg" are in common usage. In some languages, the notion of "love at first sight" literally translates as "lightning strike".