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Ball Lightning

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by

Paarth Sharma

on 9 June 2013

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Transcript of Ball Lightning

This Presentation includes: What Is Ball Lightning? What Makes Ball
Lightning a History Mystery? Existing Theories Sightings of Ball
Lightning and Other Special Facts Quiz! Which Theory Is Most Plausible and Why? Bibliography A rare kind of lightning having the form of a short-lived, luminous, floating, spherical object. It often has the size of a basketball but it can also be the size of a golf ball or even smaller. It is sometimes seen in thunderstorms. Well, Ball Lightning is a mysterious phenomenon that could go back to the year 1541! It takes up both the words HISTORY and MYSTERY. Emeritus Professor Bob Crompton of the Australian National University has 2 main theories on Ball Lightning. One theory is based on the physics of electrical discharges. The theory says that lightning strikes and travels slowly through conductive channels in the ground. A high electrical field is created in the air as the lightning moves through the ground. And ball lightning is formed from electricity discharging in this field.
This theory is highly feasible although it doesn't seem to fit in with all the scenarios given by witnesses. In my opinion, the theory by Bob Crompton is the theory which I would place my bet on because it is quite reasonable and it also has quite a connection to lightning. In the next transition i will explain why. There have been many sightings of Ball Lightning. Here is the one which interested Crompton the most. http://starryskies.com/articles/2003/08/lightning.myth.html What is Ball Lightning? What makes Ball Lightning a History Mystery? Existing Theories on Ball Lightning By Paarth Sharma Pyotr Kapitsa, a leading Soviet physicist, proposed that ball lightning is a glow discharge driven by microwave radiation (energy waves) that is guided to the ball along lines of ionized air (using high voltage to convert an atom or molecule into an ion) from lightning clouds where it is produced. The ball serves as a lasting microwave hole, automatically adjusting its radius to the wavelength of the microwave radiation so that resonance is maintained.
This theory is a little less possible than the other one, but still is workable. On Ball Lightning Theory No.1: Theory No.2: Theory No.2: Theory No.1: Theory No.3: Theory No.3: A hypothesis by Oleg Meshcheryakov suggests that ball lightning is made of nano particles, each having a battery. Sheet Lightning attacks these batteries, the result is the making of ball lightning.
In my opinion, this theory has the least possibility. It is quite reasonable because it relates sheet lightning with ball lightning. Sheet lightning is a type of lightning which goes all the way from the sky to the ground. It has a rare occurrence and ball lightning has a rare occurrence as well. Sheet Lightning is usually attracted to things like power plants and that is probably also why 5% of the people in the US have witnessed ball lightning. There are a lot of power plants in the US and on top of that it is seen by more people because it happens more often. After combining all this evidence, it is obvious that the theory is correct or is the closest theory to the answer. Crompton's colleague's wife
awoke in the early hours one
morning after a fierce lightning
strike near her home. As she
went to check on her children
n she saw a sparkling golden ball of light sitting on the lintel above the doorway to the bathroom. Here is a video of ball lightning. Did you know that the only reason scientists
haven't found out what makes ball lightning
is because it is only visible for a few moments. In this video Ball Lightning was made in a lab. Question 1. What Is Ball Lightning? A. A type of lightning which is shaped like a ball and glows. It is about the size of a molecule. B. A type of lightning which is shaped like a ball and glows. It is about the size of golf ball but never larger C. A type of lightning which is shaped like a ball and glows. It is about the size of a basketball but it can be smaller. It doesn't move D. A type of lightning which is shaped like a ball and glows. It is about the size of a basketball but can be smaller. It can travel. Question 2. Whose theory did i
think was most plausible? A. Crompton's B. Mine C. Oleg's D. Pyotr Kapitsa's If you said D than you were correct! A is the correct answer! Question 3 Match the following words with the correct definitions: ___ Ion ___ Electron ___ Proton An atom or molecule in
which there are more electrons than protons A subatomic particle with a negative elementary electric charge. A subatomic particle with a negative elementary electric charge. A. B. C. You Scored:
___________% http://www.sott.net/article/151758-Ball-lightning-bamboozles-physicist http://www.mythbusters.com/the-truth-behind-six-persistent-weather-myths-part-i.html http://en.wikipedia.org http://goodnessgraciousgreatballsoffire.com/ball_lightning.htm http://prezi.com http://www.youtube.com/ Thanks for watching and remember that Crompton's theory is the best! Which Theory Is Most Plausible and Why? Sightings of Ball
Lightning and Other Special Facts Quiz Bibliography
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