Question

what is rarefaction and compression​

Answer 1

longitudinal waves have compressions and rarefactions. Compression. 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.

Answer 2

Answer:

Waves are made up of compressions and rarefactions.

• Compression simply means that the material in question (for example air) is pressed together and its density increases. .
• Rarefaction is just the opposite, it occurs when molecules are given extra space and allowed to expand. Remember that sound is a type of kinetic energy.