Module 1 Lab 1 Properties of Waves

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School

Tidewater Community College *

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Course

202

Subject

Electrical Engineering

Date

Feb 20, 2024

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docx

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7

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NOL PHY 202 Lab - Properties of Waves (40 total points) Name: ___ ________ Before starting, please scroll through the worksheet to check the page numbers and get all the information. Complete all activities before submitting the lab. Goal: Learn the relationships between amplitude, wavelength, frequency, wave speed, and other important quantities which describe wave motion. Type your answers directly into this document. Please highlight everything you type into this report or any modifications you make in the document. There are no exceptions to this. Highlight what you did so that your instructor can easily find your answers. Simulation A: (20 points) This lab uses the Wave on a String simulation provided by PhET at the University of Colorado Boulder. Launch the simulation. In the top left box, choose “ Oscillate .” In the top right box, choose “ No End .” In the box at the bottom, change Damping to “ None .” (Slow motion might be helpful.) 1. Is this a transverse or longitudinal wave? How do you know? The wave is a transverse wave because it shows that the displacement of the particles is perpendicular to the direction of the wave's motion. With the series of peaks and valleys representing the points of maximum displacements the same can be represented in the downward direction. 2. In which direction is the wave traveling compared to the disturbance, perpendicular or parallel? Perpendicular 3. Spend a few minutes exploring the amplitude of the wave by increasing and/or decreasing it. Describe amplitude in your own words. Page 1 of 7
NOL PHY 202 Amplitude is the measure of the height of a wave which determines the energy carried by the wave. 4. Explore how amplitude affects wavelength . Use the following settings and measure the approximate wavelength. Pause the simulation after a few waves pass and use the ruler. (Click on the ruler button at the bottom right.) Amplitude Frequency Wavelength 0.75 cm 1.60 Hz 4.05 cm 0.90 cm 1.60 Hz 4.05 cm 1.05 cm 1.60 Hz 4.05 cm 1.20 cm 1.60 Hz 4.05 cm 5. When amplitude increases, wavelength _________. a. increases b. decreases c. stays the same. 6. This means that the relationship between amplitude and wavelength is ________ a. direct b. inverse c. not related 7. When amplitude increases, energy ______ a. increases b. decreases c. stays the same. 8. Return the amplitude to 0.75 cm. Then, spend a few minutes exploring the frequency of the wave by increasing and/or decreasing it. Describe frequency in your own words. 9. Explore how frequency affects wavelength . Use the following settings and measure the approximate wavelength. Pause the simulation after a few waves pass and use the ruler. Amplitude Frequency Wavelength 0.75 cm 1.40 Hz 4.45 cm 0.75 cm 1.80 Hz 3.45 cm 0.75 cm 2.10 Hz 3 cm Page 2 of 7
NOL PHY 202 0.75 cm 2.40 Hz 2.6 cm 10. When frequency increases, wavelength _______. a. increases b. decreases c. stays the same. 11. This means that the relationship between frequency and wavelength is: a. direct b. inverse c. not related 12. Return the frequency to 1.50 Hz and the amplitude to 0.75 cm. Now focus your eyes on one bead of the string. (Slow motion may help.) Describe the motion of the bead. The one bead that was focused on moved up and down in the y-axis in a repeated pattern. 13. Do waves transfer matter? Use evidence from the simulation to support your answer. Waves transfers energy but not matter. In the simulation energy is passed through a medium which is represented by the moving particles. 14. Draw a transverse wave. Label the crest, trough, amplitude, and wavelength. Simulation B: (20 points) Click on the link for Waves Intro . Choose Sound . Do not change any of the settings. 15. Push the green button to start the waves. Is this a transverse or longitudinal wave? How do you know? It is a longitudinal wave because the particles move parallel to the direction of the waves. Page 3 of 7 Wavelength Amplitude Trough Crest rest
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