Damage may be a result of the direct effects of alcohol on the brain or may result indirectly, from a poor general health status or from severe liver disease. For example, thiamine deficiency is a common occurrence in people with alcoholism and results from poor overall nutrition.
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. On the diagram above, the distance from point A to point C or from point B to point D would be representative of the wavelength.
Answers. 1  In longitudinal waves , the direction of vibration of particles are parallel to the direction of the wave motion, Thus compression and rarefaction are there in the longitudinal wave in the direction of the wave. In the case of transverse wave , the particles vibrate in a perpendicular direction, hence there are no compression and rarefaction in a transverse wave in the direction of the wave motion . The previous answer speaks about the small compression and rarefaction in any wave in a direction perpendicular to the wave motion .