It's called a compression, and the point of lowest density is called a rarefraction. This logic also applies to transverse waves.
Rarefaction only occurs in a longitudinal wave. Rarefaction is the reduction of the density of a medium. It is the opposite of compression.
Condensation is the increase in density in a longitudinal wave, thus it signifies a high pressure area, which is higher energy, which is equated to the crest of a transverse wave.
Compression
The point on a longitudinal wave where the particles of a medium are stretched apart.
Compression
Crest is the highest point for the Transerve wave. Trough is the lowest point of the Transerve wave. Compression is the part of the longitudinal wave where the particles are croweded. Rarefraction is the part of the longitudinal wave where the particles are spread aprat.
Longitudinal Wave jsuniltutorial.weebly.com
Rarefaction only occurs in a longitudinal wave. Rarefaction is the reduction of the density of a medium. It is the opposite of compression.
Condensation is the increase in density in a longitudinal wave, thus it signifies a high pressure area, which is higher energy, which is equated to the crest of a transverse wave.
Compression
The point on a longitudinal wave where the particles of a medium are stretched apart.
Compression
Sound waves are longitudinal.
Rarefaction
Compression is the region of a longitudinal wave in which the density and pressure are at a maximum. Rarefaction is the region of a longitudinal wave in which the density and pressure are at a minimum.
Radio wave is not a longitudinal wave it is a transverse wave
a longitudinal wave is a vibration like sound therfore a longditudinal wave is a sound. The pressure Vibrations of frequency between 16 - 20000 hertz, which propagates in medium we perceive as a sound. But longitudinal mechanical wave is not necessarily sound - for example wave along the spring, or density waves forming spiral structure of galaxies!