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Electromagnetic Waves Problem

  1. Aug 1, 2005 #1

    Can someone help me on the following problem:

    Suppose you are located 180 m from a radio transmitter. How many wavelengths are you from the transmitter if the station calls itself 1147 AM? (The AM band frequencies are in kilohertz.)

    I have used the following equation to find the wavelength:

    c = (wavelength) (frequency)

    wavelength = c / frequency
    wavelength = (3.0e8) / (1.147e6)
    wavelenght = 261.6

    I am not sure of what to do next to get the correct answer. Please Help.
  2. jcsd
  3. Aug 1, 2005 #2
    Firstly, that wavelength is missing its units. Secondly, all you need to do is a simple division to work out how many wavelengths are in 180 m. You should be able to see straight off that it's going to be less than 1..
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