A progressive transverse wave propagates along a stretched string. A high-speed camera captures a snapshot of the wave at a single instant in time. The diagram shows how the displacement of the string varies with distance.
Which row correctly describes both www and zzz?
w: peak-to-trough displacement; z: wavelength
w: peak-to-trough displacement; z: period
w: amplitude; z: wavelength
w: amplitude; z: period