Do the seconds between thunder and lightning really tell how far away it is? - how to tell seconds on denby pottery
Someone once told me when I was young, counting the seconds between lightning and thunder when sounds. And the number of seconds between them, was the number of miles away. I do not know if this is true or has been done to feel better. Can someone enlighten me on this?
Friday, January 29, 2010
How To Tell Seconds On Denby Pottery Do The Seconds Between Thunder And Lightning Really Tell How Far Away It Is?
4 comments:
Yes, the light at a speed nearly constant. (It is always through the room, through the atmosphere, close enough. Anyway, so fast that it can be assumed instantaneous). The sound also moves in almost constant.
Because light is so fast, we can consider the time of the lightning when it strikes. Then count the seconds, one can say how long it took to join it. Since there are almost constant speed when divided by speed, you have the distance.
The speed of sound is 340 meters per second, so that for every second it takes between lightning and thunder, lightning is about 340 meters. Approx. It lasts 5 seconds a mile.
It is true, with the exception of speed. Sound 1 mile every 5 seconds. So, in reality, when it reaches 5, which was a mile.
Not really, just because the light waves faster than sound waves.
Yes, indeed.
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