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Waves
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The
two types of waves
are the
longitudinal
and
transverse
waves.
The
medium
particles of a
longitudinal
wave vibrate
parallel
to the motion of the pulse.
Sound
waves are
longitudinal
waves.
The
two parts of longitudinal waves
are
Compression
and
Rarefaction.
Compression
is where the particles are
close together.
Rarefaction
is where the particles are
spread apart.
you can
feel energy
more
in
compression.
In a
transverse
wave, the pulse travels
perpendicular
to the disturbance.
Crest
-
positive
or
upward
displacement
Trough
-
negative
or
lower
displacement
The
equillibrium
represents the
flat line or the undisturbed.
The
dashed line
is the
equillibrium.
The
distance
of the wave from the
equilibrium
is called the
amplitude.
The distance between two consecutive waves or the length of the wave pulse is called the
wave length.
The
wave frequency
is the number of
wavelengths
that pass a
fixed
point each
second.
When frequency
increases
, wavelength
decreases.
There are two types of changing in
wave direction
and they are
reflection
and
refraction.
Reflection is the
bounce
of wave.
Refraction is the
speed change
and the
bending
of
light.