A string is stretched between point P and an oscillator M. A second string is stretched between M and point Q. M lies halfway between P and Q. The oscillator’s frequency is altered until stationary waves are produced on both strings. The wave speed on the section from P to M is twice the wave speed on the section from M to Q. Which diagram could show the stationary-wave arrangement?
Physics 9702 · AS & A Level · Stationary waves