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Ultrasound frequency problem

  1. Apr 15, 2009 #1
    1. Ultrasound with a frequency of 4.25MHz can be used to produce images of the human body. If the speed of sound in the body is the same as in salt water 1.50km/s, what is the wavelength in the body?



    2. v= wavelength(f)
    M = 10^6




    3. v= wavelength(f)
    wavelength = v/f
    = .0015/4250000
    = 3.53 x 10^-10 m
    I'm not sure if this is right.
     
  2. jcsd
  3. Apr 15, 2009 #2

    rl.bhat

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    Re: Sound/wavelength

    wavelength = v/f
    = .0015/4250000

    This step is wrong. 1.5km = ........m?
     
  4. Apr 15, 2009 #3
    Re: Sound/wavelength

    o sorry my mistake
    um so it should be (1500/4250000) which equals 3.53 x 10^-4 m?
     
  5. Apr 16, 2009 #4

    rl.bhat

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    Re: Sound/wavelength

    That is right.
     
  6. Apr 19, 2009 #5
    Re: Sound/wavelength

    thank you again!! :]
     
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