Standing waves

  • #1
theneedtoknow
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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?
 

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