# Homework Help: Standing Wave harmonics

1. Nov 24, 2009

### elliottmarter

Why does half a wave length and not a full wave length constitute the first harmonic?

v=$$\lambda$$f

because a standing waves can be made with two half waves travelling in opposite directions?

2. Nov 24, 2009

### jdwood983

Here is a good resource on http://www.physicsclassroom.com/Class/waves/U10L4e.cfm" [Broken].

Basically you are right, but your terminology isn't quite correct. The wavelength is the length up and back the string, so $\lambda=2L\rightarrow L=\frac{1}{2}\lambda$.

Last edited by a moderator: May 4, 2017
3. Nov 24, 2009

### elliottmarter

Thanks a lot, that helped