In which type of wave would you find a rarefaction?

water wave

light wave-is this the answer?

sound wave

radio wave

Question

In which type of wave would you find a rarefaction?

       water wave

       light wave-is this the answer?

       sound wave

       radio wave

anonymous · Answer

sound wave.. 

why
sound wave is a longitudinal wave
all others are the transverse waves

anonymous · Answer

just like you have crests and troughs in a translational wavem
you have compressions and rarefactions for longitudinal waves -> due to varying pressures

anonymous · Answer

sound wave . its longitudinal the primary wave being compression and the reaction wave being rarefraction