why the thunder is heard few seconds after the lightening is seen?
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This is because light travel faster than sound or speed of light is more faster than the speed of sound.
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Because speed of light is much greater than speed of sound .
When lightning occurs the surrounding air expands because of it's heat and a noise is created . This noise is known as thunder.
When lightning occurs the surrounding air expands because of it's heat and a noise is created . This noise is known as thunder.
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