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To measure the distance of the site of lightening, you will need a stopwatch. As soon as lightening occurs, turn on the stopwatch and wait until you here the roar of thunder. Stop the stopwatch as soon as you hear the sound of thunder. Multiply the time with 340 and the value you get will be the distance of the lightening from the place you are standing.
The principle behind this is that, light travels very fast. As soon as lightening occurs, you can realize the flash. But sound travels at an average speed of 340 meters/second. So the sound of thunder takes sometime to reach your ears in spite of the fact that both thunder and lightening have the same origin. By multiplying the time of the stopwatch with 340, you calculate the distance travelled by the sound wave, which is also the distance of the source of lightening from the place you are standing at.
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∙ 15y ago
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