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PHYSICS
Topic 4 WAVES
Speed of ripples traveling on surface
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Cards (7)
Ripple tank
and
light
Used to measure the
speed
of
water ripples
Using a ripple tank
1.
Small
tray of
water
2.
Motor
and
rod
to make the
ripples
3.
Motor
dips the
rod
in and out of the
water
Measuring the wavelength
1.
Light shines through the water
, showing the
shadow
of the
ripples
on the
card below
2.
Measure
the
distance
between
10
waves using a
ruler
3.
Divide
this number by
10
to find the
average wavelength
Measuring the frequency
Count
the number of
waves
in
10
seconds
Wave speed (
velocity
or
v
)
Measured in
metres per second
(
m/s
)
Frequency
(f)
Measured
in
hertz
(
Hz
)
What is Wavelength (λ)measured
Measured in metres (m)
