Lightning

Lightning. Computer artwork of a lightning strike over water. Lightning occurs when a large electrical charge builds up in a cloud. This is probably due to the rapid movement of water droplets and ice particles in the turbulent interior of the cloud. Cloud-to-ground lightning occurs between a negatively charged cloud base and the positively charged ground. 'Leader electrons' leave the cloud and when contact is made with the ground, there is a huge backflow of energy along the path of the electrons. This produces a bright flash of light and temperatures of up to 30, 000 degrees Celsius.. Stunning Photo Gifts From Science Photo Library

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