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Simple: Finding the wavelenght

  1. Jul 24, 2005 #1
    I have a picture of a wave I am looking at. Each increment on the equilibrium line is 420 cm. I am asked to find the wavelength. there are 7 increments between one location of the first wave and the second wave. I multiply 7 times 4.2 meters and the answer is still wrong. Why?
  2. jcsd
  3. Jul 24, 2005 #2
    What do you mean by "each increment on the equilibrium line"?. I don't really understand your description. Do you have a graph of a wave or something? The wavelength is just the distance from one peak to the next, or one trough to the next. Edit: it doesn't necessarily have to be peak to peak, for example, but it's just easier to see it if you take it as that.
    Last edited: Jul 24, 2005
  4. Jul 24, 2005 #3
    Thank you Nylex, but that was the first thing I did. I am still getting a "incorrect answer". Yes, I am looking at a picture of a wave. I though I was dong something wrong so I multiplied the number of increments times the given lenght. Am I wrong or am I missing a step?
  5. Jul 24, 2005 #4
    What do you mean by "increments"? :confused:
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