http://220.127.116.11/~physics/p103/applets/sos_prelab/sos_prelab_pt1.html For my homework, i have to use this java applet and answer the 5 questions at the bottom. Now, i had no problem finding the period, frequency, or length of the tube in terms of the wavelength. But i'm really having troulbe finding the wavelength This applet and how it is worded really confuses me. How am i supposed to find the wavelength of the wave my dragging the little microphone around inside the tube? it really doesnt make sense to me. how can i find the distance between an node and an antinode by dragging the little microphone around? can anyone give me a hint? Once i get the wavelength i can find the velocity, but if i dont get the wavelength i miss both problems.