Gelombang longitudinal
Longitudinal wave
is a wave that has a vibration direction parallel to the direction of the wave creep
slinki example is driven back and forth. When slinki driven forward-backward ¬ slinki
then be formed on the density and stretched. One wavelength in the longitudinal
wave is defined as the distance between two adjacent central density or the
distance between two adjacent stretched center.
Pictured
above is a spring that vibrated at the
end. If we look at the picture
above we can
see that the direction
of vibration in the direction of
the waves, so-called longitudinal waves. A
series of density and strain propagate along the
spring. Density is the area where the coil
spring toward each other, whereas strain is a region
where the coil spring
menjahui each other. If the wave form
pattern tranversal have peaks and valleys,
the longitudinal waves consisting of density
and strain patterns. Wavelength is the distance between successive density
or strain sequence.
Is meant here is the distance of two points and
the same sequence on the density or strain (see
example in the picture above).
Lots of examples of longitudinal waves that occur in
everyday life. One example is sound waves in air. Air as the medium of
propagation of sound waves, close together and stretched along the direction of
propagation of the air. Unlike the water waves or waves of string, sound waves
can not we see the use of the eye. If someone likes listening to music, he's
usually playing with a loud volume. If you have time try to see a loudspeaker.
Note the movement of the loudspeaker, would move back and forth. It will result
in vibration, and vibration that will result in air density and the strain
causing the sound waves. We now know why the source of the sound must vibrate,
because the vibration of air will form a longitudinal wave that will cause the
sound waves.
formula of the second wave are:
V = λ
. f
V = λ
/ T '
Description:
T = period of wave
V = fast wave propagation (m / s)
λ =
wavelength (m)
f = frequency (Hz)
