Flash and thunder are produce simultanneously, but thunder is heard a few seconds after the flash is seen.why?
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This is because the speed of sound in air is very less than the speed of light in air
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Speed of sound is 330 m/sec in air medium at 0°C. Whereas speed of light is 3 x 108m/sec. When we compare the speed of light with that of speed of sound, the speed of light is greater than that of the speed of sound. Therefore thunder is heard a few seconds after the flash is seen.
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