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Distance between two points of differing phase

  1. Jan 30, 2009 #1
    1. A wave has a wavelength of 20 cm. Calculate the minimum distance between 2 points on the wave which differ in phase by 60 degrees

    2. ummmm

    3. I have drawn a sine wave from 0 to 360, and have marked the point where 60 degress should be. I dont really know why though. Very stuck, even though it seems like an easy short question. Missing something here for sure.
  2. jcsd
  3. Jan 30, 2009 #2
    Is it 3.33?

    I need to learn the simple definition of what phase is I think.

    EDIT: Doesn't matter, I've had to hand it in now. Just guessed at 3.33. Which is probably wrong, but it was only two marks so its not the end of the world.
    Last edited: Jan 30, 2009
  4. Jan 30, 2009 #3


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    Science Advisor
    Homework Helper

    Hopefully you showed your reasoning in determining your answer. A guess
    often earns: 0 credit, or if your teacher is generous: 1/4 credit.

    To gain a better feel for phase you may want to review your book's definition and look particularly at any associated diagrams. A search of the internet on phase as it relates to wave phenomena will also give you insight. Here's one reference.
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