Question

How is the wavelength of a longitudinal wave determined?

by measuring the distance from crest to trough
by measuring between adjacent rarefactions
by measuring between adjacent troughs
by measuring the distance from compression to rarefaction

Answer 1

Wavelength can always be found by measuring the distance between any two corresponding points on adjacent waves.

In the case of a longitudinal wave, a wavelength measurement is made by measuring the distance from a compression to the next compression or from a rarefaction to the next rarefaction.

The correct answer is :

By measuring between adjacent refractions.

Answer 2

by measuring distance between adjacent rarefactions

Wavelength is the distance between two consecutive points in a wave that are in the same phase, two consecutive rarefactions/compressions in the same phase can give the wavelength of the wave

btw, long time no see, how're you and your coffee maker, Tyon ? XD

this is Maria, (TheIncorporealKlaus)