flash and thunder are produced simultaneously.but thunder is heard a few seconds after the flash is seen why? how does the speed of sound in air vary with rise in density of the medium
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The flash of lightning is seen first and the sound of thunder is heard a little later though both are produced at the same time in clouds.
it is due to the very high speed of light that we can see the flash of lightning first and it is due to comparatively low speed of sound that thunder is heard a little later.
The speed of sound in air is 344 m/s & and the speed of light in air is 300,000,000 m/s. Hence, the speed of light is very great as compared to the speed of sound.
Increase in density of medium, speed of sound decreases because the velocity of sound is inversely proportional to the square root of density of the medium.
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Hope this will help you....
it is due to the very high speed of light that we can see the flash of lightning first and it is due to comparatively low speed of sound that thunder is heard a little later.
The speed of sound in air is 344 m/s & and the speed of light in air is 300,000,000 m/s. Hence, the speed of light is very great as compared to the speed of sound.
Increase in density of medium, speed of sound decreases because the velocity of sound is inversely proportional to the square root of density of the medium.
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Hope this will help you....
Answered by
1
Speed of sound is much less than the speed of light, so light reaches the eyes of observation in very less time while sound takes a few seconds to reach our ears.
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