picture: the wave longitudinal.jpg
Longitudinal wave is a wave that has a vibration direction parallel to the direction of the wave rambatnya slinki example is driven back and forth. When moved forward slinki ¬ mundu-then the density will be formed and slinki renggangan as shown in Figure 5. One wavelength in the longitudinal wave is defined as the distance between two adjacent central density or the distance between two adjacent renggangan centers.
The formula of the second wave are: F V = λ V = λ / T Description: T = wave period V = fast wave propagation (m / s) λ = wavelength (m) f = frequency (Hz)
Example Problem: The distance between the nearest peaks and valleys is 80 cm. If within 10 seconds there were 60 waves that pass a point, what is the rapid propagation of these waves? Discussion: Wave has peaks and valleys is the wave transversal.Dari picture below shows that ½ λ = 80 cm, so that λ = 160 cn. In 10 s occurred 60 waves. f = 60 / (10) wave / s f = 6 Hz V = λ f
= 160 X 6 = 960 cm / s
= 9.6 m / s So rapid is the wave propagation was 9.6 m / s
The terms on the longitudinal wave
The wavelength of longitudinal waves. Because of the length density and renggangan not the same, then the wavelength should we define the term central density and central renggangan. Consider the illustration in Figure 1.5.
Figure 1.5. longitudinal wavelength In longitudinal waves, one wave (1λ) consists of a density and a renggangan. Wavelength is defined as the distance between two adjacent central density or the distance between two adjacent centers renggangan. The distance between the center and renggangan adjacent density is half the wavelength or ½ λ.
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