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Lecture on Lightning

Lecture on Lightning. Lightning. The action of rising and descending air within a thunderstorm separates positive and negative charges. Water and ice particles also affect the distribution of electrical charge.

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Lecture on Lightning

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  1. Lecture on Lightning www.assignmentpoint.com

  2. Lightning • The action of rising and descending air within a thunderstorm separates positive and negative charges. • Water and ice particles also affect the distribution of electrical charge. www.assignmentpoint.com

  3. Lightning results from the buildup and discharge of electrical energy between positively and negatively charged areas. • Most lightning occurs within the cloud or between the cloud and ground. www.assignmentpoint.com

  4. Lightning is a sudden electrostatic discharge that occurs during an electrical storm. This discharge occurs between electrically charged regions of a cloud (called intra-cloud lightning or IC), between that cloud and another cloud (CC lightning), or between a cloud and the ground (CG lightning). www.assignmentpoint.com

  5. Water and ice move around inside the cloud; forced up by warm air currents, down by gravity, and compressed in the cloud. Just as rubbing a balloon can create static electricity, the particles in the cloud become charged. It’s not clear how it happens, but charges separate in the cloud. Positive charges move up, and negatives move down. www.assignmentpoint.com

  6. Once a significant charge separation has built up, the positive and negative charges seek to reach each other an neutralise. ‘Streamers’ come up from the ground to form a pathway. Once a pathway is completed a spark forms, neutralizing the charge. • As the negative charge races down, the air surrounding it heats up.The spark is very hot at almost 20,000 degrees Celsius, and it rapidly heats the air to create a shock wave. www.assignmentpoint.com

  7. Considering light travels very fast – about 300 million metres per second, and that sound only travels at 300 metres per second; light is a million times faster than the sound produced. To find out how far away the storm is, you can count how long you hear the sound after the lightning. For every 4 seconds between the flash and the rumble, the thunderstorm is 1 mile away. www.assignmentpoint.com

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