# Wave Interference

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• Interference
• Double Slit
• Diffraction
• Waves

### 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 1.10

### Teacher-Submitted Activities

Concept questions for Physics using PhET (Inquiry Based) Trish Loeblein HS
UG-Intro
MC Physics
Algebra-based Physics Semester one lessons, clicker questions, and schedule in pdf (Inquiry Based) Trish Loeblein UG-Intro
HS
HW
Lab
Demo
Physics
Invention Lab_Wave Interference Noah Podolefsky UG-Intro
HS
Lab Physics
Wave unit (Inquiry Based) Trish Loeblein UG-Intro
HS
Lab
Demo
Physics
Wave demonstrations: water, sound, light (Inquiry Based) Trish Loeblein HS
UG-Intro
CQs
Demo
Physics
Wave clicker questions (Inquiry Based) Trish Loeblein HS
UG-Intro
CQs Physics
Probability and Randomness Interactive Lecture Sam McKagan, Kathy Perkins, Carl Wieman, and Noah Finkelstein UG-Intro
CQs
Demo
Physics
Wave Interference (PreAP) Elyse Zimmer HS Lab Physics
Wave Interference with Water Waves (AP) Elyse Zimmer HS Lab Physics
Water Waves in an Electric Sink Dean Baird, Paul G. Hewitt HS Lab Physics
Light Behaves Like a Wave (sometimes...) Nathan Quarderer HS
UG-Intro
Lab Earth Science
Physics
How do PhET simulations fit in my middle school program? Sarah Borenstein MS Other Biology
Earth Science
Physics
Chemistry
PhET Sims Aligned to the Chemistry Curriculum Julia Chamberlain HS
UG-Intro
Other Chemistry
MS and HS TEK to Sim Alignment Elyse Zimmer MS
HS
Other Biology
Chemistry
Physics
Mapping of PhET and IBDP Physics Jaya Ramchandani HS Other Physics
Wave Interference and Path Difference Simon Lees HS Lab
Guided
HW
Physics
Wave Diffraction Simon Lees HS HW
Lab
Guided
Physics
Wave Interference & Fringe Patterns Simon Lees HS Guided
HW
Lab
Physics
Applications of Parametric Equations Andrzej Sokolowski HS
UG-Intro
HW Mathematics
Wave Interference in 2D Karen King, Cory Hofschild HS Lab Physics
The Fringe of Optics Dean Baird, Paul G. Hewitt UG-Intro
HS
Lab Physics
Virtual Ripple Tank Craig Young HS Lab Physics
Demonstrating the principle of phase plugs used in loudspeakers by Wave Interference Csaba Horvath Other Demo Physics
Oscilatory Motion Mohamed AbdelWahab UG-Intro Other Physics
CD's, DVD's & Optical Commmunication: Binary Coding and Diffraction Errors Debra Krause Dandaneau UG-Intro
HS
Lab
Other
Physics
Lab. Waves Marsha Harden HS Lab
Ripple While You Work David Moutoux HS HW
Lab
Physics
Light and Sound Wave Properties Kristi Goodwin MS Lab Physics
Wavey Simulation Gretchen Swanson HS Lab Physics
Diffraction Stephan Graham HS Lab Physics
percobaan interferensi dengan berbantuan program phet rini wahyuningsih HS Lab Physics
Albanian All shqip Interferenca Valëve
Arabic All العربية تداخل الموجة
Arabic (Morocco) All العربية (المغرب) تداخل الموجة Wave Interference
Basque All Euskara Uhin-interferentzia
Belarusian All беларускі Інтэрферэнцыя хваль
Bosnian All Bosanski INTERFERENCIJA TALASA
Bulgarian All български Интерференция на вълни
Catalan All català Interferències entre ones
Chinese (Simplified) All 中文 (中国) 水波干涉
Chinese (Traditional) All 中文 (台灣) Wave Interference 水波干涉
Croatian All hrvatski Interferencija valova
Czech All čeština Vlnová interference
Danish All Dansk Bølgeinterferens
Dutch All Nederlands Golven: interferentie
Finnish All suomi Aaltojen interferenssi
French All français Ondes et intérférences
Galician All Gallegan Interferencia de ondas
Georgian All ქართული ტალღის ინტერფერენცია
German All Deutsch Interferenz
Greek All Ελληνικά Συμβολή κυμάτων
Hebrew All עברית התאבכות גלים
Hungarian All magyar Hullámok interferenciája
Indonesian All Bahasa Indonesia Interferensi Gelombang
Italian All italiano Interferenza di onde
Japanese All 日本語 干渉(Wave Interference)
Khmer All Khmer អាំងទែផេរ៉ង់នៃរលក
Korean All 한국어 파동의 간섭
Kurdish (Turkey) All Kurdish (Turkey) Tevlihevbûna Pêlan
Lao All Lao ການແຊກແຊງຄື້ນ
Macedonian All македонски Интерференција на бранови
Marathi All मराठी तरंग प्रतिघात
Mongolian All Монгол (Монгол) Долгионы интерференци
Norwegian Bokmal All Norsk bokmål Bølgeinterferens(forstyrrelser)
Persian All فارسی تداخل امواج
Polish All polski Interferencja fal
Portuguese All português Interferência de Onda
Portuguese (Brazil) All português (Brasil) Interferência de Ondas
Russian All русский Интерференция волн
Serbian All Српски Интерференција таласа
Slovak All Slovenčina Interferencia vlnenia
Slovenian All Slovenščina Valovna interferenca
Spanish All español Interferencia De la Onda
Spanish (Mexico) All español (México) Interferencia De la Onda
Spanish (Peru) All español (Perú) Interferencia de Ondas
Swedish All svenska Våginterferens
Thai All ไทย การแทรกสอดของคลื่น
Turkish All Türkçe Wave Interference
Turkmen All Turkmen Tolkunyň interferensiýasy
Ukrainian All українська Wave Interference
Vietnamese All Tiếng Việt Giao thoa sóng
Welsh All Welsh Ymyriant Tonnau
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Microsoft Windows
XP/Vista/7/8.1/10