Properties of
Waves
COPY ON PAGE 16 IN SPIRAL
JUMP ROPE LAB:
WHAT WILL HAPPEN TO A WAVE IF WE
INCREASE THE DISTURBANCE ?
HYPOTHOSIS:
____________________________________
____________________________________
________THEN________________________
________________________.
COPY TABLE 3 TIMES TITLING TABLE 1 AS 50%
EFFORT, TABLE 2: 75 % EFFORT, TABLE 3 90%
EFFORT
LINE
DOES THE
(DRAW THE LINES) WAVELENGTH
(INCREASE/
DECREASE)
1ST FROM 40CM
TO 60CM
2ND FROM 20CM
TO 80CM
3RD WHOLE
METER
IS AMPLITUDE
SIZE
SMALL/BIG
DOES
FREQUENCY
(INCREASE/
DECREASE)
COPY PAGE 17
CREATE A CLAIM BASED OFF YOUR DATA TABLE
USING 3 PIECES OF EVIDENCE AND
HYPOTHESES TO ANSWER THE FOLLOWING:
HOW DOES THE DISTURBANCE IN THE MEDIUM
AFFECT THE WAVELENGTH, AMPLITUDE, AND
FREQUENCY ?
SUBMIT TO JUPITER
TAKE A PICTURE OF ONE OF YOUR WAVES MADE
IN LAB. OPEN THE PICTURE IN NOTABILITY
AND IDENTIFY AND LABEL ALL THE PARTS OF
THE WAVE.
INCLUDE THE WAVES:
-AMPLITUDE - WAVELENGTH -TROUGH CREST
- EQUILIBRIUM POINT -90 DEGREE ANGLE IN
WAVE
What exactly is a wave?
●
●
Wave: Any disturbance that
can distribute and can
transmit energy through
matter or space.
●
Other examples….
●
Radio waves
●
Analog or HD digital TV signals
●
Cellular reception
Matter meaning liquids,
gases, or solids
●
Microwave ovens
●
SONAR
●
Light waves from the sun
●
Crossfit ropes
Waves Carry Energy
●
●
Medium: solid, liquid, or gas
through which waves can
travel
Waves carry energy through
the medium….not the
medium carries the wave
energy
●
Waves do work on
everything in its path….
●
Ex. Waves at the beach
●
List 3 other examples
Energy Transfer without a Medium
●
We are talking space
●
Examples
●
We cannot hear sound
in space, because it
needs a medium
●
Light waves from the
sun
●
List 2 more
●
Some waves travel
MUCH faster in space
Types of Waves
3types
Transverse Wave
● Particles in the medium
wave vibrate up and
down
● Transverse means
moving across
● Ex…crossfit ropes
●
●
●
●
Longitudinal Waves
Particles in the medium
vibrate back and forth
Push on a spring
Compression: portions
are tighter than normal
Rarefaction: particles
are less crowded
together
Amplitude
●
Amplitude: maximum
distance a wave vibrates
from its rest position
●
Rest position means neutral
●
Larger the amplitude, the
taller the wave is
●
Larger Amplitude means
more energy placed in to
the wave.
Wavelength
●
Wavelength: distance
between 2 adjacent
crests or compressions
in a series of waves.
●
Can also be measured
on the trough of a wave
Frequency
●
●
●
Frequency: Number of
waves produced over a
given time period
Waves can be counted by
the number of crests or
troughs that pass a point
over a certain amount of
time.
Directly related to a wave’s
wavelength
●
Expressed in hertz (Hz). 1 Hz
= 1/s
●
Higher frequency = more
energy
●
Longer wavelength = less
energy
Wave Speed
●
Wave Speed: speed at
which a wave travels
●
Speed of a wave
depends on medium it is
traveling through
●Velocity =
Wavelength X
Frequency
WAVES AND MOVEMENT
WHAT MAKES WAVES
MOVE?
ARE WE DISTURBING THE
ROPE?
IF WE SHAKE A JUMP ROPE
SIDE TO SIDE ON THE
GROUND WHAT ARE YOU
PUTTING INTO IT?
HOW CAN WE DISTURB THE
ROPE MORE?
Review
● Please write
down 3 things
you learned
today….