Wave Interference
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Description
Make waves with a dripping faucet, audio speaker, or laser! Add a second source to create an interference pattern. Put up a barrier to explore single-slit diffraction and double-slit interference. Experiment with diffraction through elliptical, rectangular, or irregular apertures.
Sample Learning Goals
- Make waves with water, sound, and light and see how they are related.
- Design an experiment to measure the speed of the wave.
- Create an interference pattern with two sources, and determine the ways to change the pattern.
- Find points of constructive and destructive interference by eye and by using the detectors.
- Put up a barrier to see how the waves move through one or two slits. What sort of pattern do the slits create? How can you change this pattern?
- For light, predict the locations of the fringes that appear on the screen using d sin(θ) = mλ. Use the tape measure to verify your predictions.
- Explain how the aperture geometry relates to the diffraction pattern.
- Predict how changing the wavelength or aperture size affects the diffraction pattern.
Teacher Tips
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Overview of sim controls, model simplifications, and insights into student thinking ( PDF ). |
Teacher-Submitted Activities
| Algebra-based Physics Semester one lessons, clicker questions, and schedule in pdf (Inquiry Based) |
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Trish Loeblein | UG-Intro HS |
HW Demo Lab |
Physics |
| Concept questions for Physics using PhET (Inquiry Based) |
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Trish Loeblein | HS UG-Intro |
MC | Physics |
| Waves Interference Remote Labs |
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Trish Loeblein | UG-Intro HS |
Lab Remote |
Earth Science Physics |
| Invention Lab_Wave Interference |
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Noah Podolefsky | HS UG-Intro |
Lab | Physics |
| Wave Interference (PreAP) |
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Elyse Zimmer | HS | Lab | Physics | |
| Wave Interference with Water Waves (AP) |
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Elyse Zimmer | HS | Lab | Physics | |
| Alignment of PhET sims with NGSS |
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Trish Loeblein updated by Diana López | MS | Other | Physics Biology Earth Science Chemistry |
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| PhET Sims Aligned to the Chemistry Curriculum |
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Julia Chamberlain | HS UG-Intro |
Other | Chemistry | |
| How do PhET simulations fit in my middle school program? |
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Sarah Borenstein | MS | Other | Earth Science Physics Biology Chemistry |
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| 2-Point Source Interference Lab | V Brdarevic | HS | Remote Lab |
Physics | ||
| Exploring Light as a Wave | Walter Jurek | MS HS |
Guided HW Remote Lab |
Physics | ||
| Guided Discovery (Chinese/English) for Freshman University Physics: 6. Wave Interference | Janet Chen (陳衫豫), Charity Grace White (白愛恩), Jonathon David White (白小明 | UG-Intro | Remote Lab Guided |
Physics | ||
| Guided Discovery (Chinese/English) for Freshman University Physics: 5. Introduction to Waves | Janet Chen (陳衫豫), Charity Grace White (白愛恩), Jonathon David White (白小明) | UG-Intro | Remote Guided Lab |
Physics | ||
| MS and HS TEK to Sim Alignment | Elyse Zimmer | HS MS |
Other | Biology Physics Chemistry |
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| In/Post-Class Worksheet, Wave Interference, Sound/Water, PhET | Solmaz Khodaeifaal | MS HS |
Lab Demo HW Guided |
Physics | ||
| Pre/In/Post-Class Worksheet, Wave Interference, PhET | Solmaz Khodaeifaal | MS HS |
Demo Other HW Guided Remote Discuss Lab |
Physics | ||
| Mapping of PhET and IBDP Physics | Jaya Ramchandani | HS | Other | Physics | ||
| Wave Interference- Waves (Sound and Light) | Lonny Villalobos, M.Ed. | MS | Other Guided |
Physics Earth Science |
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| Waves on a String and Wave Interference Virtual Labs | Jennifer Hamilton | HS MS |
Lab HW Guided |
Physics | ||
| Serie de Labs virtuales de Ondas |
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Trish Loeblein (traducción de Diana López) | UG-Intro HS |
Remote Lab HW Discuss Guided |
Physics | |
| PREPARATORIA: Alineación de PhET con programas de la DGB México (2017) |
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Diana López | HS UG-Intro |
Other | Chemistry Physics Mathematics |
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| 大一物理引導式自我發現 (中文/英文): 干涉和衍射 | Janet Chen (陳衫豫), Charity Grace White (白愛恩), Jonathon David White (白小明 | UG-Intro | Lab Guided Remote |
Physics | ||
| 大一物理引導式自我發現 (中文/英文): 波浪介紹 | Janet Chen (陳衫豫), Charity Grace White (白愛恩), Jonathon David White (白小明) | UG-Intro | Lab Guided Remote |
Physics | ||
| GUIA LABORATORIO ONDAS | Raúl Eduardo Cruz Garzón | UG-Intro HS |
Lab | Physics |
Browse legacy activities.
HTML5 sims can run on iPads and Chromebooks, as well as PC, Mac, and Linux systems on modern web browsers. If you are experiencing issues using an HTML5 sim on a supported platform, please disable any browser extensions.
iPad:
iOS 12+ Safari
iPad compatible sims
Android:
Not officially supported. If you are using the HTML5 sims on Android, we recommend using the latest version of Google Chrome.
Chromebook:
Latest version of Google Chrome
The HTML5 and Flash PhET sims are supported on all Chromebooks.
Chromebook compatible sims
Windows Systems:
Microsoft Edge, latest version of Firefox, latest version of Google Chrome.
Macintosh Systems:
macOS 10.13+, Safari 13+, latest version of Chrome.
Linux Systems:
Not officially supported. Please contact phethelp@colorado.edu with troubleshooting issues.
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