after lightning (thunder) the sound is heard after 4 seconds find the distance of cloud in which lightning took place
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this is because the speed of sound is less than speed of light..
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apexjitendra:
here distance is asked
not the theory that sound is slower than the speed of light
Lightning reaches the observer with a very large speed, i.e., with the speed of light (3 x 108 m/s).Thus,the entire time of 4 s between the seeing of lightning and hearing of thunderstorm is taken by the sound to travel to the observer.Hence,distance of the thunder cloud i.e. s = vt = (340 m/s) (4 s) = 1360 m = 1.36km.
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Here sound travel from medium air .
So the speed of sound in air is 342m/s.
Distance = speed * time
Speed =342m/s
Time = 4s
Distance = 4*342
=1368 metres.
So the speed of sound in air is 342m/s.
Distance = speed * time
Speed =342m/s
Time = 4s
Distance = 4*342
=1368 metres.
you are wrong d=(v*t)/2
Its not echo
Sound is reaching towards our ear directly
Check your statement before judgement.
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