Question

Define the terms compression and rarefraction of wave?

Answer 1

Hey Friend !

Longitudinal wave travels in the form of alternate compressions and rarefactions

Compression is the region , when the particles of the longitudinal wave comes closer.
It is the region where the pressure and density is high.

Rarefaction is the region , when the particles  of the longitudinal wave go far from each other.
It is the region where pressure and density is low.

Answer 2

Answer:

Explanation:

A compression is a region in a longitudinal wave where the particles are closest together. Rarefaction. A rarefaction is a region in a longitudinal wave where the particles are furthest apart.