Question

what are longitudinal waves????

Answer 1

Longitudinal waves are waves in which the displacement of the medium is in the same direction as, or the opposite direction to, the direction of propagation of the wave. Mechanical longitudinal waves are also called compressional or compression waves, because they produce compression and rarefaction when traveling through a medium, and pressure waves, because they produce increases and decreases in pressure.

Answer 2

the particles of the medium oscillate about their central or mean position ,in a direction parallel to the propagation of the wave such waves are called longitudinal waves