Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Standing waves

  1. Feb 10, 2009 #1
    I know that typically, standing waves (liek those produced in a musical instrument sloed at both ends, or by a rope tied to a point) have a relationship between the length (of the rope/instrument) and the possible wavelengths characterized by wavelength = 2xlength / n
    where n is an integer number, and that produces 1st harmonic, 2nd harmonic, so on.

    But what about if only one end is fixed and the other is not? (like jiggling a ripe tied with a loop to a pole such that the loop can move up and down)?
    How is their relationship defined then?
    I know that the closed end still remains as a node, but the other end will now be an antinode instead of a node
    so would it be
    wavelength = 2xlength / n-0.5?
    since there's 0.5 less "loops" produced?
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?