thunder and lightning distance calculation
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Revision as of 19:58, 15 January 2014 by Root (talk | contribs) (Created page with 'Category: Engineering When you see a flash of lightning begin to count. When you hear the thunder stop the count. Thunder travels approximately 1/3 kilometer per second, or …')
When you see a flash of lightning begin to count. When you hear the thunder stop the count.
Thunder travels approximately 1/3 kilometer per second, or 1/5 mile per second.
So if you counted 5 seconds then the lightning was a mile away.
If you counted 3 seconds then the lightning was a kilometer away.