# Wave Interference

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 Original Sim and Translations

### 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.
Version 2.0.3

### Teacher Tips

 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) Trish Loeblein UG-Intro
HS
Demo
HW
Lab
Physics
Concept questions for Physics using PhET (Inquiry Based) Trish Loeblein UG-Intro
HS
MC Physics
Waves Interference Remote Labs Trish Loeblein HS
UG-Intro
Lab
Remote
Physics
Earth Science
Invention Lab_Wave Interference Noah Podolefsky HS
UG-Intro
Lab Physics
Wave Interference (PreAP) Elyse Zimmer HS Lab Physics
Wave Interference with Water Waves (AP) Elyse Zimmer HS Lab Physics
Alignment of PhET sims with NGSS Trish Loeblein updated by Diana López MS Other Biology
Chemistry
Earth Science
Physics
PhET Sims Aligned to the Chemistry Curriculum Julia Chamberlain UG-Intro
HS
Other Chemistry
How do PhET simulations fit in my middle school program? Sarah Borenstein MS Other Chemistry
Earth Science
Physics
Biology
2-Point Source Interference Lab V Brdarevic HS Lab
Remote
Physics
Exploring Light as a Wave Walter Jurek MS
HS
HW
Remote
Guided
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
Lab
Guided
Physics
MS and HS TEK to Sim Alignment Elyse Zimmer MS
HS
Other Biology
Physics
Chemistry
In/Post-Class Worksheet, Wave Interference, Sound/Water, PhET Solmaz Khodaeifaal HS
MS
Demo
Guided
HW
Lab
Physics
Pre/In/Post-Class Worksheet, Wave Interference, PhET Solmaz Khodaeifaal HS
MS
Demo
Other
HW
Lab
Remote
Discuss
Guided
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
Earth Science
Physics
Waves on a String and Wave Interference Virtual Labs Jennifer Hamilton MS
HS
HW
Lab
Guided
Physics
Serie de Labs virtuales de Ondas Trish Loeblein (traducción de Diana López) UG-Intro
HS
Discuss
HW
Remote
Lab
Guided
Physics
PREPARATORIA: Alineación de PhET con programas de la DGB México (2017) Diana López UG-Intro
HS
Other Physics
Mathematics
Chemistry

Remote
Guided
Physics

Guided
Remote
Physics
GUIA LABORATORIO ONDAS Raúl Eduardo Cruz Garzón HS
UG-Intro
Lab Physics
Albanian All shqip Interferenca e valëve
Arabic All العربية تداخل الموجات
Azerbaijani All Azerbaijani Dalğaların interferensiyası
Basque All Euskara Uhin-interferentzia
Bosnian All Bosanski Interferencija talasa
Catalan All català Interferència d'ones
Chinese (Simplified) All 中文 (中国) 波的干涉
Chinese (Traditional) All 中文 (台灣) Wave Interference_波的干涉
Croatian All hrvatski Wave Interference
Czech All čeština Interference vln
Danish All Dansk Bølgeinterferens
Dutch All Nederlands Interferentie van golven
French All français Interférence d'ondes
German All Deutsch Wellen Interferenz
Greek All Ελληνικά Συμβολή κυμάτων
Gujarati All Gujarati તરંગ હસ્તક્ષેપ -Pankajsid34
Hebrew All עברית הפרעת גלים
Hungarian All magyar Hullámok interferenciája
Italian All italiano Interferenza tra onde
Japanese All 日本語 波の干渉
Kazakh All Kazakh Толқындар интерференциясы
Korean All 한국어 파동의 간섭
Latvian All Latviešu Viļņu interference
Malay All Bahasa Melayu Interferens Gelombang
Maori All Maori Wave Interference
Marathi All मराठी Wave Interference
Mongolian All Монгол (Монгол) Долгионы Интерференц
Norwegian Bokmal All Norsk bokmål Bølgeinterferens
Norwegian Nynorsk All Norwegian Nynorsk Bølgjeinterferens
Persian All فارسی تداخل امواج
Polish All polski Interferencja fal
Portuguese (Brazil) All português (Brasil) Interferência de Onda
Romanian All română Interferența undelor
Russian All русский Интерференция волн
Serbian All Српски Интерференција таласа
Slovak All Slovenčina Interferencia vlnenia
Slovenian All Slovenščina Valovanje in interferenca
Spanish All español Interferencia de Ondas
Spanish (Mexico) All español (México) Interferencia de Ondas
Spanish (Peru) All español (Perú) Interferencia de Ondas
Swedish All svenska Våginterferens
Tamil All Tamil Wave Interference
Telugu All Telugu తరంగ వ్యతికరణం
Thai All ไทย การแทรกสอดของคลื่น
Turkish All Türkçe Dalgalarda Girişim ve Kırınım
Ukrainian All українська Інтерференція хвиль
Urdu All Urdu Wave Interference
Uzbek All Uzbek To‘lqin interferensiyasi
Vietnamese All Tiếng Việt Giao thoa sóng
Welsh All Welsh Wave Interference

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Design Team Third-party Libraries Thanks To
• Noah Podolefsky (original designer)
• Diana López Tavares
• Ariel Paul
• Kathy Perkins
• Katie Woessner
• Cheryl McCutchan (graphic arts)
• almond-0.2.9.js
• base64-js-1.2.0.js
• FileSaver-b8054a2.js
• font-awesome-4.5.0
• game-up-camera-1.0.0.js
• he-1.1.1.js
• himalaya-0.2.7.js
• imageprocessing-labs-fft-1.0.0.js
• jama-1.0.2
• jquery-2.1.0.js
• lodash-4.17.4.js
• pegjs-0.7.0.js
• seedrandom-2.4.2.js
• text-2.0.12.js
• TextEncoderLite-3c9f6f0.js
• This material is based upon work supported by the National Science Foundation under STROBE Grant No. DMR 1548924.