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Multiple Slit Diffraction Model
written by Fu-Kwun Hwang
edited by Robert Mohr and Wolfgang Christian
The EJS Multiple Slit Diffraction model allows the user to simulate Fraunhofer diffraction through single or multiple slits. The user can modify the number of slits, the slit width, the slit separation and the wavelength of the incident light. The scale of the diffraction pattern can also be changed and a plot of the light intensity can be toggled on and off with a checkbox. A basic theoretical introduction to diffraction is included.

The Multiple Slit Diffraction Model was created using the Easy Java Simulations (Ejs) modeling tool.  It is distributed as a ready-to-run (compiled) Java archive.  Double clicking the ejs_ntnu_optics_MultipleSlitDiffraction.jar file will run the program if Java is installed.  Ejs is a part of the Open Source Physics Project and is designed to make it easier to access, modify, and generate computer models.  Additional Open Source Physics programs for quantum mechanics are available.  They can be found by searching ComPADRE for Open Source Physics, OSP, or EJS.

Please note that this resource requires at least version 1.5 of Java (JRE).
1 source code document is available
Subjects Levels Resource Types
- Diffraction
- General
- Interference
= Interference From Two Sources
Quantum Physics
- Probability, Waves, and Interference
- Upper Undergraduate
- Lower Undergraduate
- Instructional Material
= Interactive Simulation
= Model
Material Category Lab Software Type Ratings
- Software Exchange
- Simulation
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Intended Users:
Access Rights:
Free access
This material is released under a GNU General Public License Version 3 license.
Rights Holder:
Fu-Kwun Hwang
Record Cloner:
Metadata instance created November 22, 2008 by Wolfgang Christian
Record Updated:
June 10, 2014 by Andreu Glasmann
Last Update
when Cataloged:
October 22, 2008
Other Collections:

ComPADRE is beta testing Citation Styles!

Record Link
AIP Format
F. Hwang, Computer Program MULTIPLE SLIT DIFFRACTION MODEL (2008), WWW Document, (
F. Hwang, Computer Program MULTIPLE SLIT DIFFRACTION MODEL (2008), <>.
APA Format
Hwang, F. (2008). Multiple Slit Diffraction Model [Computer software]. Retrieved July 19, 2024, from
Chicago Format
Hwang, Fu-Kwun. "Multiple Slit Diffraction Model." (accessed 19 July 2024).
MLA Format
Hwang, Fu-Kwun. Multiple Slit Diffraction Model. Computer software. 2008. Java (JRE) 1.5. 19 July 2024 <>.
BibTeX Export Format
@misc{ Author = "Fu-Kwun Hwang", Title = {Multiple Slit Diffraction Model}, Month = {October}, Year = {2008} }
Refer Export Format

%A Fu-Kwun Hwang %T Multiple Slit Diffraction Model %E Robert Mohr %E Wolfgang Christian, (eds) %D October 22, 2008 %U %O application/java

EndNote Export Format

%0 Computer Program %A Hwang, Fu-Kwun %D October 22, 2008 %T Multiple Slit Diffraction Model %E Mohr, Robert %E Christian, Wolfgang %8 October 22, 2008 %U

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Citation Source Information

The AIP Style presented is based on information from the AIP Style Manual.

The APA Style presented is based on information from APA Electronic References.

The Chicago Style presented is based on information from Examples of Chicago-Style Documentation.

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