Longitudinal waves

• Longitudinal waves 


  Is a wave in which the particles of the medium vibrate parallel to the direction of movement of the wave.

  
• Compressions:


  A region of high pressure and the particles are close together.
• Rarefactions:

  A region of low pressure ad the particles are far apart.
• Period(T)

  A wave is the time that one wave pulse takes to move past a fixed point.