The Physics Classroom » Lesson Plans » Conceptual Physics » Vibrations, Waves, and Sound

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Vibrations, Waves, and Sound

The lesson plans below include links to the specific resources on our website.

Teacher Guides for labs can be found here.

NOTE: All CalcPad problem sets are customized problem sets created specifically for this course. The links direct users to the Guest version. Task Tracker users should use the link on the Task Tracker page to the trackable CalcPad version.

 

Day 1 of Vibrations, Waves, and Sound

Lesson Plan
  1. Introduce unit
  2. Lab 1: Pendulum Paint (Whole class demonstration Lab)
    Suspend an acrylic paint container from ceiling by two strings so it swings as a pendulum; set it up to slowly drip paint onto butcher paper below. Pendulum frequency can be controlled by holding strings at a fixed height while it is swinging. Start pendulum swinging and pull paper with a constant speed vehicle. Dripped paint forms a wave. Do two trials - one with red paint and a long pendulum and another with blue paint and a short pendulum. Use a short enough pendulum (and long enough paper) to get >2 cycles minimum. Measure time for 2 cycles, length of repeating pattern, and (in a separate trial) speed of tractor. Plan for a mess. Plan for a WOW!
  3. Discuss vibrational motion: define: period, frequency, and amplitude; damping; use motion detector and vibrating mass on a spring to show that position and velocity vary as a function of time in a sinusoidal manner 
  4. Pair Practice: Vibrations Think Sheet (1)
 
Homework/Announcements
  1. Reading: Physics Classroom Tutorial, Vibrations and Waves: Lesson 0, Parts a and b
  2. Concept Builder: Frequency and Period


 

Day 2 of Vibrations, Waves, and Sound

Lesson Plan
  1. Lab 2 - A Wiggle in Time and Space
    Observe Particle Wave Simulation. Student's observe and describe a red particle's motion. They observe and describe all the particle's motion. They describe the motion of the resulting pattern moving across the screen.
    Do and process; emphasize a vibration is a wiggle in time. A wave is a collection of wigglers ... a wiggle in time extended across space.
  2. Discuss the nature of a wave and categories of waves (longitudinal vs. transverse; mechanical vs. EM)
  3. Pair Practice: Waves Think Sheet (2)
  4. If time allows, Minds On Physics: Mission WM1 on Nature and Categories of Waves
 
Homework/Announcements
  1. Reading: Physics Classroom Tutorial, Vibrations and Waves: Lesson 1, Parts a, b, and c
  2. Minds On Physics: Mission WM1 on Nature and Categories of Waves


 

Day 3 of Vibrations, Waves, and Sound

Lesson Plan
  1. Physics Interactives: Simple Wave Simulator with Student Activity Sheet
    Do and process; assign accompanying Concept Checker
  2. Discuss Wave Properties
    Frequency, period, amplitude, wavelength, speed - definitions, units, mathematical relationships
  3. If time allows, do Simple Wave Simulator Concept Checker

Homework/Announcements
  1. Reading: Physics Classroom Tutorial, Vibrations and Waves: Lesson 2, Parts a, b, and c
  2. If not done in class, complete Concept Checker: Simple Wave Simulator Concept Checker


 

Day 4 of Vibrations, Waves, and Sound

Lesson Plan
  1. Pair Practice: Wave Properties Think Sheet (3)
    Complete; check answers, then do ...
  2. Concept Builder: Wave Characteristics
  3. Concept Builder: Wave Basics
  4. Lab 3 - Speed of a Wave
    Do as a demo lab if equipment is limited or to insure best results.  

Homework/Announcements
  1. Reading: Physics Classroom Tutorial, Vibrations and Waves: Lesson 2, Parts d and e
  2. Complete any incomplete work: Wave Characteristics | Wave Basics
 
 

Day 5 of Vibrations, Waves, and Sound

Lesson Plan
  1. Discuss Wave Speed
    Definition, units; v=d/t and v=f•λ; depends on properties of the medium
  2. Pair Practice: Wave Speed Think Sheet (4)
    Complete; check answers; then do ...
  3. Science Reasoning Center: Wave Speed
  4. If time allows, start CalcPad: Waves & Sound 1 on Wave Speed

Homework/Announcements
  1. Review as needed: Physics Classroom Tutorial, Vibrations and Waves: Lesson 2, Parts d and e
  2. CalcPad: Waves & Sound 1 on Wave Speed
 
 

Day 6 of Vibrations, Waves, and Sound

Lesson Plan
  1. Physics Interactives: Boundary Behavior of Waves with Student Activity Sheet
    Do and process; discuss wave behavior at a boundary
  2. Quick Quiz on Learning Outcomes 1 - 4
 
Homework/Announcements
  1. Reading: Physics Classroom Tutorial, Vibrations and Waves: Lesson 3, Parts a and b
  2. Concept Checker: Boundary Behavior
 
 

Day 7 of Vibrations, Waves, and Sound

Lesson Plan
  1. Physics Interactives: Wave Addition with Student Activity Sheet
    Do and process
  2. Discuss Wave Interference
    Definition; two types; result; diagram; principle of superposition
  3. Concept Checker: Wave Addition
 
Homework/Announcements
  1. Reading: Physics Classroom Tutorial, Vibrations and Waves: Lesson 3, Part c
  2. Concept Builder: Wave Interference
 
 

Day 8 of Vibrations, Waves, and Sound

Lesson Plan
  1. Review, then do Pair Practice: Wave Behavior Think Sheet (5)
  2. Demonstrate/Discuss Standing Wave Patterns
    Animation of how they are formed: https://www.desmos.com/calculator/xgq0tckhyz
    Patterns, nodes, antinodes, wavelength-length relationship, harmonics; frequency relationships
  3. Physics Interactives: Standing Wave Maker with Student Activity Sheet
    Do; process. Follow up with the Concept Checker
 
Homework/Announcements
  1. Reading: Physics Classroom Tutorial, Vibrations and Waves: Lesson 4, Parts b, c, and d
  2. If not done in class, complete Concept Checker
 
 

Day 9 of Vibrations, Waves, and Sound

Lesson Plan
  1. Review standing waves; demonstrate with a Slinky or a wave machine
  2. Guided/Pair/Individual Practice: Standing Wave Mathematics Think Sheet (6)
  3. Minds On Physics: Mission WM7 on Standing Wave Patterns and Harmonics
  4. If time allows, start CalcPad: Waves & Sound 2 on Standing Wave Math
 
Homework/Announcements
  1. Reading: Physics Classroom Tutorial, Vibrations and Waves: Lesson 4, Part e
  2. CalcPad: Waves & Sound 2 on Standing Wave Math
 
 

Day 10 of Vibrations, Waves, and Sound

Lesson Plan
  1. Discuss Sound Waves
    Mechanical wave; Longitudinal vibrations (in fluids) ==> Pressure Wave; compressions and rarefactions
    Frequency/pitch; meaning of wavelength and amplitude; wave speed in air; intensity of sound; demonstrations
  2. Pair Practice: Sound Waves Think Sheet (7)
  3. Science Reasoning: Sound as a Pressure Wave
  4. Quick Quiz on Learning Outcomes 5 - 6

Homework/Announcements
  1. Physics Classroom Tutorial, Sound Waves and Music: Lesson 1, Parts a, b, and c
  2. Minds On Physics: Mission SM1 on The Nature of a Sound Wave
 
 
 

Day 11 of Vibrations, Waves, and Sound

Lesson Plan
  1. Review sound properties; then Pair Practice: Sound Waves Think Sheet (7)
    Do and check answers
  2. Lab 4 - Tuning Fork Frequency
  3. Science Reasoning Center: Sound Intensity and the Decibel System (Activities 1 and 2 only)
 
Homework/Announcements
  1. Reading: Physics Classroom Tutorial, Sound Waves and Music: Lesson 2, Parts a, b, and c
  2. Minds On Physics: Mission SM2 on Characteristics of Sound Waves
 
 

Day 12 of Vibrations, Waves, and Sound

Lesson Plan
  1. Discuss sound intensity and the deciBel Scale
    Explain the logarithmic nature of deciBels; it's a "powers on 10 thing". Use Decibel Scale Think Sheet (8)
  2. Pair Practice: complete Decibel Scale Think Sheet (8)
    Do and check answers; then start ...
  3. Concept Builder: Decibel Scale
  4. If time allows, start Minds On Physics: Mission SM3 on Intensity and the Decibel Scale

Homework/Announcements
  1. Reading: Physics Classroom Tutorial, Sound Waves and Music: Lesson 2, Part b
  2. Minds On Physics: Mission SM3 on Intensity and the Decibel Scale
 
 

Day 13 of Vibrations, Waves, and Sound

Lesson Plan
  1. Discuss natural frequency, forced vibrations, resonance; review harmonics and standing wave patterns; "fundamental frequency"; demonstrations. 
  2. Lab 5 - Natural Frequency and Standing Waves (as a demonstration lab)
    Requires sound interface probes OR our Sound Spectrum Viewer in FFT Mode
  3. Pair Practice: complete Resonance Think Sheet

Homework/Announcements
  1. Reading: Physics Classroom Tutorial, Sound Waves and Music: Lesson 4, all Parts
  2. Minds On Physics: Mission SM5 on Resonance and Standing Wave Patterns
 
 

Day 14 of Vibrations, Waves, and Sound

Lesson Plan
  1. Review: Standing waves in strings
    Nodes and antinodes; harmonics; wave patterns; length-wavelength relationship; fundamental frequency, fn = n•f1
  2. Concept Builder: Wavelength (2nd and 3rd activities only)
  3. Pair Practice: Standing Waves in Strings Think Sheet (9)
    Do and check answers
 
Homework/Announcements
  1. Reading: Physics Classroom Tutorial, Vibrations and Waves: Lesson 5, Parts a and b
  2. Minds On Physics: Mission SM6 on Harmonics for String Instrucments
 
 

Day 15 of Vibrations, Waves, and Sound

Lesson Plan
  1. Concept Builder: Name That Harmonic - Strings
  2. Discuss Resonating Open-End Air Columns
    Patterns, relationships between L and wavelength; fundamental frequency, fn = n•f1
  3. CalcPad: Waves & Sound 3 on Resonating Strings 

Homework/Announcements
  1. Reading: Physics Classroom Tutorial, Vibrations and Waves: Lesson 5, Part c
  2. CalcPad: Waves & Sound 3 on Resonating Strings
 
 

Day 16 of Vibrations, Waves, and Sound

Lesson Plan
  1. Pair Practice: Open-End Air Columns Think Sheet (10)
    Do and check answers
  2. Concept Builder: Name That Harmonic - Open-End Air Columns
  3. Start CalcPad: Waves & Sound 4 on Open-End Air Columns
 
Homework/Announcements
  1. Review as needed: Physics Classroom Tutorial, Vibrations and Waves: Lesson 5, Part c
  2. CalcPad: Waves & Sound 4 on Open-End Air Columns
 
 

Day 17 of Vibrations, Waves, and Sound

Lesson Plan
  1. Discuss Resonating Closed-End Air Columns
    Vibrational node at the closed-end, patterns, relationships between L and wavelength; fundamental frequency, fn = n•f1
  2. Pair Practice: Closed-End Air Columns Think Sheet (11)
    Do and check answers
  3. Lab 6 - Closed-End Air Columns
    Force an adjustable-length air column (cylindrical tube suberged in the water of a 2-L graduated cylinder) into resonance using a tuning fork of known frequency; measure L of air column; calculate wavelength and determine wave speed; account for end-effects for best results
 
Homework/Announcements
  1. Reading: Physics Classroom Tutorial, Vibrations and Waves: Lesson 5, Part d
  2. Minds On Physics: Mission SM10 on Harmonics for Closed-End Air Columns
 
 

Day 18 of Vibrations, Waves, and Sound

Lesson Plan
  1. Review closed-end mathematics; more practice
  2. Concept Builder: Name That Harmonic - Closed-End Air Columns
  3. CalcPad: Waves & Sound 5 on Closed-End Air Columns
  4. Introduce Project: Design and Tune a Pan Flute (in BONUS folder) (optional)
 
Homework/Announcements
  1. Review as needed: Physics Classroom Tutorial, Vibrations and Waves: Lesson 5, Part d
  2. CalcPad: Waves & Sound 5 on Closed-End Air Columns
 
 

Day 19 of Vibrations, Waves, and Sound

Lesson Plan
Project: Design and Tune a Pan Flute(in BONUS folder) (optional)
  • Create a pan flute using 8 PVC tubes (closed at one end) that play frequencies of 523 Hz (C5), 587 Hz (D5), 659 Hz (E5), 698 Hz (F5), 784 Hz (G5), 880 Hz (A5), 988 Hz (B5), and 1047 Hz (C6). Assume v = 340 m/s.
  • Calculate the L of closed-end air column to produce such frequencies; check calculations with teacher
  • Add 1 cm to L to allow for insertion of foam plug to close off end; cut PVC tubes to length
  • Insert foam piece; adjust location and measure frequency using a frequency meter like Spectrum Viewer (<== we have one!!) or Audio Analyzer (<== we have two!!)
  • Use trial-and-error to get the frequency perfect; then use hot glue to seal location of foam piece
  • Repeat for all 8 PVC tubes
  • Assemble PVC tubes with open-ends flush to produce final instrument
  • Look up some simple songs to play with C-D-E-F-G-A-B-C. Pick a song and practice playing the song.
  • Perform your concert for your classmates
 
Homework/Announcements
  1. Complete all unfinished work
 
 

Day 20 of Vibrations, Waves, and Sound

Lesson Plan
  1. Discuss tomorrow's test
  2. Day 2 of Project: Design and Tune a Pan Flute(in BONUS folder) (optional)
  • Create a pan flute using 8 PVC tubes (closed at one end) that play frequencies of 523 Hz (C5), 587 Hz (D5), 659 Hz (E5), 698 Hz (F5), 784 Hz (G5), 880 Hz (A5), 988 Hz (B5), and 1047 Hz (C6). Assume v = 340 m/s.
  • Calculate the L of closed-end air column to produce such frequencies; check calculations with teacher
  • Add 1 cm to L to allow for insertion of foam plug to close off end; cut PVC tubes to length
  • Insert foam piece; adjust location and measure frequency using a frequency meter like Spectrum Viewer (<== we have one!!) or Audio Analyzer (<== we have two!!)
  • Use trial-and-error to get the frequency perfect; then use hot glue to seal location of foam piece
  • Repeat for all 8 PVC tubes
  • Assemble PVC tubes with open-ends flush to produce final instrument
  • Look up some simple songs to play with C-D-E-F-G-A-B-C. Pick a song and practice playing the song.
  • Perform your concert for your classmates  

Homework/Announcements
  1. Prepare for Tomorrow's Test
  2. Complete all unfinished work