Longitudinal wave
In addition to a transverse wave, there is also a longitudinal wave. If the transverse wave vibration direction perpendicular to the direction of propagation medium, then the longitudinal wave, the direction of medium vibration parallel to the direction of wave propagation. If you are confused by this explanation, imagine that the vibration of a spring. Note the picture below ...
In the picture above it appears that the direction of vibration parallel to the direction of wave propagation. A series of density and strain propagating along the spring. Density is the area where the coil spring toward each other, while the strain is the region where the coil spring menjahui each other. If you analyze the transversal wave has a pattern of peaks and valleys, the longitudinal wave consists of a pattern of density and strain. Wavelength is the distance between successive density or strain, respectively. What is meant here is the distance from the same two points and a sequence of density or strain (see the example in the picture above).
One example is logitudinal wave of sound waves in air. Air as the medium of sound wave propagation, docked and stretched along the direction of wave propagation in the air. Unlike the water waves or waves of the rope, the sound waves we can not see using the eye. You like to hear a music khan? nah, try to touch the loudspeaker when you're playing the songs. The greater the volume of the song playing, the harder the loudspeaker to vibrate. If observed carefully, the loudspeaker is vibrating back and forth. In this case the loudspeaker serves as a source emits sound waves and sound waves (longitudinal waves) through the medium of air. Concerning the more sound waves will be studied on the subject of its own.
In the above discussion, it was explained that the waves strap gurumuda is an example of a transverse wave, while the examples of longitudinal waves are sound waves. And what about the water wave? not fully water waves transverse waves or longitudinal waves. Water waves are a combination of transverse waves and longitudinal waves. To facilitate understanding of yourself, please watch the video below.
From a long explanation and the previous rambling;), we can conclude several critical issues related to wave mechanics:
First, the vibration wave is propagating with a certain rate through a particular medium. Medium referred to here can be a string, water, springs, soil and so forth. Creep rate of vibration known as the alias propagation rate wave speed (v). Wave speed is determined by the properties of the medium through which the waves. Btw, do not confuse speed with the speed of the wave medium through which the waves.
Second, the medium through which the waves are just moving back and forth on its equilibrium position, the medium does not propagate like a wave.
Third, the wave can occur when a medium vibrate or oscillate. A medium to vibrate or oscillate if an attempt is made aliases are working on the medium. In this case, when the effort or work done on a medium then the energy is transferred to the medium. Now, when the vibrations propagate (called a wave propagating vibration), the energy is transferred from one place to another through these mediums. Waves do not move the material or medium in its path, the wave of energy ... just move the note that our earlier discussion related to the wave mechanics. Therefore if the wave mentioned that I mean the wave mechanics.
