Rarefaction.
P-waves are longitudinal and S-waves are transverse waves.
rarefactions
they are called compressions
Longitudinal
Light waves are transverse.Sound waves may be transverse or longitudinal. Sound in gases can only be longitudinal.
No Sound waves are longitudinal. Being longitudinal they cannot be POLARISED.
rarefactions
P-waves are longitudinal and S-waves are transverse waves.
transverse and longitudinal
longitudinal wave
All sound waves are longitudinal (compression/rarefaction) waves.