Question

what is are the different types of longitudinal waves and their properties?

Answer 1

Sound waves and electromagnetic waves in materials with E&M anisotropy, some of the modes of guided waves and surface waves.

Longitudinal Waves – the oscillations are parallel to the direction of energy transfer. For example sound waves. Longitudinal waves like sound form compressions (areas of high pressure) and rarefaction (areas of low pressure).

if u want to know more:


Longitudinal wave, wave consisting of a periodic disturbance or vibrationthat takes place in the same direction as the advance of the wave. A coiled spring that is compressed at one end and then released experiences a wave of compression that travels its length, followed by a stretching; a point on any coil of the spring will move with the wave and return along the same path, passing through the neutral position and then reversing its motion again. Sound moving through air also compresses and rarefies the gas in the direction of travel of the soundwave as they vibrate back and forth. The P (primary) seismic waves are also longitudinal. In a longitudinal wave, each particle of matter vibrates about its normal rest position and along the axis of propagation, and all particles participating in the wave motion behave in the same manner, except that there is a progressive change in phase (q.v.) of vibration—i.e., each particle completes its cycle of reaction at a later time. The combined motions result in the advance of alternating regions of compression and rarefaction in the direction of propagation.

Answer 2

Longitudinal waves include sound waves (vibrations in pressure, particle of displacement, and particle velocity propagated in an elastic medium) and seismic P-waves (created by earthquakes and explosions).