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Homework Help: Frequency question

  1. Jan 11, 2010 #1
    URGENT!!!! Frequency question

    1. The problem statement, all variables and given/known data
    A radio antenna for an AM station is 75m high tower that is equivalent to lamda/4; another lamda/4 corresponds to ground reflection. At what frequency does the station transmit?


    2. Relevant equations
    v=f(lamda)
    E=cB

    3. The attempt at a solution

    Actually, I am not sure what equation to use!?

    Please help..I think it's a simple question if i know the equation
     
  2. jcsd
  3. Jan 11, 2010 #2

    rl.bhat

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    Re: URGENT!!!! Frequency question

    What is the velocity of radio waves?
    Use the relevant equation to find f.
     
  4. Jan 11, 2010 #3
    Re: URGENT!!!! Frequency question

    THe answer is 1M Hz..v=f lamda
    is not the right equation to use?
     
  5. Jan 11, 2010 #4

    rl.bhat

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    Re: URGENT!!!! Frequency question

    The formula is correct. In the problem wavelength λ = 2*150m. What is the velocity of radio waves?
     
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