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File Size: 11 MB
1 Comment
ClimateCraze
- 3 years ago  
Not quite right. A typical cloud-to-ground flash begins as negative charges travel toward the ground in a sequence of spurts. This makes the ground positively charged. As the negative charges approach the ground, there is an upward stream of positive charges. When the two streams meet an initial flash occurs and a channel forms so that electricity can flow between the cloud and ground. This occurs so quickly that it looks like a single brilliant flash but high speed photography shows several bolts.