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Sound produced by a thunderstorm is heard 10 s after the lightning is seen. Calculate the approximate distance of the thunder cloud. (Given speed of sound = 340 m s–1.)
Answers (1)
The speed of light is very large in comparison with the speed of sound.
We can assume that lightning can be seen, without any time delay as light travels very fast.
If the sound produced by thunderstorm is heard 10 seconds after lightning that means sound took 10 seconds to reach from thundercloud.
As the speed of sound is 340 m/s, so distance travelled by sound in 10 seconds will be 3400 meters.
So the approximate distance of thunder cloud is 3.4 km.
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