However instead of crests and troughs, 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.
<span>The oven will transform electrical energy into heat energy</span>
A time-varying magnetic field can be caused by fluctuating electric fields.
