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Homework Help: Beat frequency strobe lights

  1. Apr 7, 2009 #1
    1. The problem statement, all variables and given/known data

    The strobe lights on top of two tall radio towers both have a period of about 1.00 s. When turned on simultaneously, a keen observer notes that during an 813 s interval, the lights gradually fall out of synchronization and then come back into flashing synchronously. What is the interval ΔT between the periods of the two beacons?

    2. Relevant equations

    abs(f1-f2)=beat frequency

    3. The attempt at a solution
    unsure of where to begin...
    also what exactly does delta-T refer to?

    thank you
  2. jcsd
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