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Tension, Linear Mass Density, and transverse waves

  1. Feb 6, 2009 #1
    Not 100% sure if this is supposed to be in Math or Physics...Admin please move if it is wrong...?
    1. The problem statement, all variables and given/known data

    A long string under tension t having linear mass density u1 is tied to a second string with linear mass density u2 << u1. Transverse waves on the heavey string are incident on the junction. Find what happens to them.

    2. Relevant equations

    I don't know :(

    3. The attempt at a solution

    I do know tht when a wave goes through something with a different mass density, it changes the wave speed, but the frequency and amplitude stay the same, but that is all I really understand (and I am not even 100% on that). I think I may just be over thinking the problem, so any direction to start would be awesome.

    I know i have been asking a lot of questions, but I don't have a pre-req for this class, so I am trying to learn as I go...and sometimes and getting lost.
  2. jcsd
  3. Feb 6, 2009 #2


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    Homework Helper

    This is a 1-D wave scattering problem. You must apply two continuity conditions at the junction: continuity of displacement and continuity of positional derivative of displacement. Or, your book may have some formula that you simply plug into, which is a lot less work.

    EDIT: sorry, I don't think that is the point of the problem question. Ignore the above.
    Last edited: Feb 6, 2009
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