Physics for IGCSE & O level - Waves And Sounds (Section 4 - No. 25)
Which statement best describes the direction of movement in a longitudinal wave?
The movement is perpendicular to the wave's direction.
The movement is at an angle to the wave's direction.
The movement is parallel to the wave's direction.
The movement is circular.
Forklaring
In a longitudinal wave, the oscillations occur in the same direction as the wave's travel.