Posted by Tyrone on .
A rule of thumb for estimating the distance in kilometers between an observer and a lightning stroke is to divide the number of seconds in the interval between the flash and the sound by 3. Discuss whether or not this rule is correct.
I say it is correct because the speed of light is faster than the speed of sound, sound has a delay. (Am I heading in the right direction with this answer.)
Introduction to Physical Science -
you are headed in the right direction.
Light also has a delay, but it is so short that the difference in arrival time is due entirely to the slow speed of sound, which is approximately
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