An illustration of a ringing bell and dots representing air molecules. The dots are close together, then far apart and close together again representing a longitudinal mechanical wave of sound going from the bell to an ear. A ringing bell is sending a longitudinal wave to your ear. What else is true about the longitudinal wave? Check all that apply. All sound waves are longitudinal. Energy is transferred perpendicular to the wave’s motion. Mechanical waves can be longitudinal. Electromagnetic waves can be longitudinal. Longitudinal waves require a medium to travel through.
