When an object such as a stone is dropped into water, it disturbs the surface of the water. Waves form at the surface of the water and travel outward from the point of the disturbance. The diagram below is based on a single frame from a Video of the waves that formed when a stone was dropped into water. If a student were to measure the distance labeled as "Z," she would know the value of the

of the wave.

Without the diagram, it is difficult to provide a specific answer. However, in general, if a student were to measure the distance labeled as "Z" in a diagram showing waves formed by a stone dropped into water, they would typically be measuring the wavelength of the wave. The wavelength represents the distance between two corresponding points on the wave, such as between two consecutive crests or two consecutive troughs.