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Finding wave frequency by using a strobe

  1. Mar 6, 2005 #1
    I've learnt about finding wave frequency by using a strobe.
    The book suggest that we first find out the frequency by the "frozen" properties.
    I think this method is rather inaccurate.
    If I am carrying out the experiment, I would first find the wavelength and the velocity. Do you ?
     
  2. jcsd
  3. Mar 6, 2005 #2

    HallsofIvy

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    HOW would you go about finding the wavelength and velocity?

    Yes, depending on the situation, using the rather primitive apparatus I suspect you are using (when I first did this we used a disk with a hole turned by hand!) but I don't see any simple way of finding the wavelength and velocity- what equipment do you have?
     
  4. Mar 7, 2005 #3
    A ruler to measure the distance between two crests when it is frozen,
    Measure distance travelled in a given time to find out the velocity.
     
  5. Mar 7, 2005 #4

    HallsofIvy

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    To see if that is more reasonable, we would have to know exactly what equipment you are working with and what kind of wave you have. A strobe light in a darkened room illuminating a wave in a string?
     
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