Vibration
Vibration is a back and
forth motion of an object through a point of periodically imbalance. Periodic
motion is a vibration or movement made objects back and forth through a certain
path back to each position and velocity after a certain time interval. The
vibration is defined as one full vibrate, it means from the starting point back
to that point. The maximum deviation is performed on events called amplitude
vibrations.
The number of full vibration that occur per unit
time called frequency denoted as f and the unit is Hertz (Hz). Period is the
time it takes to do a full- time vibe. Period denited as T expressed in units
of second.
Wave
Wave is a vibration that goes , as long
as the waves carry energy propagation. Wave is due to the vibration source. On
the wave, propagates requires material medium, but the medium or intermediet not
follow to move.
According
to wave the intermediary substance differentiated into two kinds:
a. Electromagnetic
waves are waves
that do not require a medium/intermediate. Example is the light wave. Sunlight
to reach the earth, but at the top of the atmosphere is a vacuum, there is no
any medium to propagate. This proves that the light does not need a medium to
propagate, so that the light included into the electromagnetic wave. Another
example is the radio waves, TV waves, light - X, and gamma rays.
b.
Mechanical wave is a wave
that requires a medium/intermediate to propagate. An example is the rope wave,
sound waves, waves on strings, sea waves and so on.
Based on the
direction of wave propagation and vibration directions, wave can be devided:
a.
Transverse waves is a wave whose direction of
vibration perpendicular to the direction of propagation. Examples of transverse
waves are vibrations sinat plucked guitar, and waves of string. The single
transverse wavelength has a hill and a valley. Wavelength can also be
considered as the distance from peak or valley to valley distance of.
b.
Longitudinal
wave is a wave vibration direction parallel to the direction of propagation. Density
is an area where the coil spring toward each other, while the strain is an area
where each coil spring to keep away. The wavelength is the distance between the
density and the distance from the tip density or strain propagates to the end
of the next starain propagares.
Wavelength (l)
= distance covered in a single wave period. SI unit is
the wavelength in meters (m). Amplitude is the most distant wave amplitude
deviation only in the transverse waves. Wave propagation speed (v) is the
distance traveled is a wave in one second, the unit is meters/second (m/s).
For
t=T
S=distance
(meter) l
=wavelength (meter) f=frequenci
(Hertz)
t= time(second) T=period v=velocity (meter/second)
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