Detail Page

Item Picture
X-Ray Diffraction JS Model
written by Wolfgang Christian
How did Rosalind Franklin discover the helical structure of DNA? The X-Ray Diffraction JavaScript Model computes diffraction patterns from first principles for simple apertures including a sinusoidal wave corresponding to a 2D projection of a helix as described in a paper by Braun, Tierney and Schmitzer.

"How Rosalind Franklin Discovered the Helical Structure of DNA: Experiments in Diffraction," Gregory Braun, Dennis Tierney and Heidrun Schmitzer, The Physics Teacher, vol 49.3, 140-143 (2011).

The X-Ray Diffraction JavaScript Model was developed using the Easy Java Simulations (EJS) version 5.  This beta release is distributed as a ready-to-run html page and requires only a browser with JavaScript support.
2 source code documents are available
Subjects Levels Resource Types
Modern Physics
- Biophysics
- Condensed Matter
= Crystal Structure
Oscillations & Waves
- Wave Motion
= Interference and Diffraction
- Lower Undergraduate
- High School
- Upper Undergraduate
- Instructional Material
= Interactive Simulation
Intended Users Formats Ratings
- Learners
- Educators
- text/html
- application/zip
- application/javascript
  • Currently 0.0/5

Want to rate this material?
Login here!

Access Rights:
Free access
This material is released under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 license.
Rights Holder:
Wolfgang Christian
Record Cloner:
Metadata instance created January 16, 2017 by Wolfgang Christian
Record Updated:
September 29, 2023 by Wolfgang Christian
Other Collections:

AAAS Benchmark Alignments (2008 Version)

4. The Physical Setting

4F. Motion
  • 6-8: 4F/M4. Vibrations in materials set up wavelike disturbances that spread away from the source. Sound and earthquake waves are examples. These and other waves move at different speeds in different materials.
  • 6-8: 4F/M7. Wave behavior can be described in terms of how fast the disturbance spreads, and in terms of the distance between successive peaks of the disturbance (the wavelength).
  • 9-12: 4F/H6ab. Waves can superpose on one another, bend around corners, reflect off surfaces, be absorbed by materials they enter, and change direction when entering a new material. All these effects vary with wavelength.
ComPADRE is beta testing Citation Styles!

Record Link
AIP Format
W. Christian, Computer Program X-RAY DIFFRACTION JS MODEL, Version 1.0 (2017), WWW Document, (
W. Christian, Computer Program X-RAY DIFFRACTION JS MODEL, Version 1.0 (2017), <>.
APA Format
Christian, W. (2017). X-Ray Diffraction JS Model (Version 1.0) [Computer software]. Retrieved June 18, 2024, from
Chicago Format
Christian, Wolfgang. "X-Ray Diffraction JS Model." Version 1.0. (accessed 18 June 2024).
MLA Format
Christian, Wolfgang. X-Ray Diffraction JS Model. Vers. 1.0. Computer software. 2017. 18 June 2024 <>.
BibTeX Export Format
@misc{ Author = "Wolfgang Christian", Title = {X-Ray Diffraction JS Model}, Year = {2017} }
Refer Export Format

%A Wolfgang Christian %T X-Ray Diffraction JS Model %D 2017 %U %O 1.0 %O text/html

EndNote Export Format

%0 Computer Program %A Christian, Wolfgang %D 2017 %T X-Ray Diffraction JS Model %7 1.0 %U

Disclaimer: ComPADRE offers citation styles as a guide only. We cannot offer interpretations about citations as this is an automated procedure. Please refer to the style manuals in the Citation Source Information area for clarifications.

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.

The MLA Style presented is based on information from the MLA FAQ.

This resource and its subdocuments is stored in 1 shared folders.

You must login to access shared folders.

X-Ray Diffraction JS Model:

Is Based On Easy Java Simulations Modeling and Authoring Tool

Use the Easy Java Simulations Modeling and Authoring Tool to edit and to explore the source code for the X-Ray Diffraction JS Model.

relation by Wolfgang Christian

Know of another related resource? Login to relate this resource to it.
Save to my folders



Related Materials

Similar Materials