Wave Properties with Waves on a String Simulation
Author: Jackie Esler
Student guide:
Student Guide
Name:____________________
Discuss the words in the box.
o review we have already covered and new you will learn today
Review:
New: (check-off at the end)
crest
amplitude
trough
frequency
line of origin
oscillate vs. pulse
Guiding Question:
How do the properties of amplitude and frequency affect wavelength?
Start:
Phet Waves on a string
1. Click on the first link
2. For this activity you will be collecting data to explore three properties of a wave.
3.
Explore the simulation with your partner. Be sure to click on all the buttons.
4. For the first set of investigations, we will look at amplitude.
you need to be on
The rest of your screen should be set up like this:
Look over the data table, on the back, and discuss how get the data you need.
moves the wave.
Esler/2011
Wave Properties with Waves on a String Simulation
Author: Jackie Esler
Amplitude setting
Height of wave at the start
Student Guide
Distance ring moves on pole (end)
(be sure your ruler is lined up correctly)
100
50
5
Discuss what happened to the energy at the end of the wave when we changed the
amplitude. Be prepared to share your thoughts on this with the class
5.
Repeat number 4 using
and then
Why didnt we use these options for the experiment with the amplitude button?
__________________________________________________________________
Teacher
Check- point
6. For this next part we will investigate wavelength.
You need to be on
The rest of your screen should be set up like we did for number 4.
Try out the
button after you hit pause. This may be useful for collecting data.
Data:
wavelength = _______ cm
Wavelength = _____
7.
cm
Talk about the wavelength of the two waves you measured.
Discuss how they were similar and how they were different.
Be prepared to share your thoughts with the class.
Teacher check-off
Name __________
Day 2: For the third set of investigations, we will look at frequency.
you need to be on
Esler/2011
Wave Properties with Waves on a String Simulation
Student Guide
Author: Jackie Esler
open both the ruler and timer
controlled variables: Amplitude and damping should be left on 50 and tension stays on
high
Remember, to stop or slow the wave use pause/play and .
1.
Look over the data table and discuss how you will collect the data you need.
2. Before you begin try a little practice using the timer:
Turn the timer on, off and reset the timer while waves are moving.
3. Practice counting waves passing a given point:
Move the vertical ruler so that it is along the waves path.
This will be the point where you watch waves pass and count
them. Count 5 waves passing the ruler. Change the frequency and count again.
4.
Data:
frequency
Fill in the table by working together counting the waves and using the timer.
Time
interval
50
10
seconds
10
10
seconds
100
10
seconds
Number of waves:
Trial #1
Trial #2
Trial #3
Average number
of waves counted
in 10 second
period
Number of
waves in 1
second
frequency**
*To find frequency, divide the average number of waves counted by the time interval.
5.
Talk about the data.
Decide on a way your group can explain wave frequency to the class.
Write your idea(s) on the lines.
Esler/2011
Wave Properties with Waves on a String Simulation
Student Guide
Author: Jackie Esler
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
Frame: Our data show that the higher the number chosen for the frequency on the slider,
the _________________ the number of waves passing ____________________ in a
certain amount of ________________________.
6. Use arrows, or draw on the wave, to show what will happen when the amplitude is increased:
7. Use arrows, or draw on the wave, to show what will happen when the frequency is increased:
Line of
--origin-----
Line of
--origin-----
Esler/2011
