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    adam vencato's Avatar
    adam vencato Posts: 8, Reputation: 2
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    #1

    Mar 4, 2007, 06:59 AM
    thunder and lightning physics
    hello everyone

    Could You tell me how to calculate the movement in time of thunder and lightning.

    I Would like to know why thunder comes before lightning:::how do you calculate the equation of the time level of thunder to lightning

    my calculation is represented as 5 seconds to 1 mile away please correct me if I am wrong

    ciao ciao

    adam vencato

    ven-car-toe
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
    Uber Member
    		  
    #2

    Mar 4, 2007, 07:22 AM
    Lightning(the light) comes before thunder(the sound) because the speed of sound is slower than the speed of light.

    the speed of light is 300,000,000 m/s, the speed of sound is about 340 m/s

    The speed of light is so fast that it might as well be instant.

    So the other thing you want to know is how long it takes sound to travel a mile.

    well a mile is 1609 meters.

    so using d = st we find that t = 1609/340 = 4.7 seconds.

    so when lightning hits 1 mile away, the thunder comes 4.7 seconds after the lightning.
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