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The Open Source Physics Project is supported by NSF DUE-0442581.

Computer Program Detail Page

Item Picture
Noon Shadow Model
written by Wolfgang Christian and Todd Timberlake
The Noon Shadow model shows the geometry of the shadow cast by a gnomon at noon.  Users can change the orientation of the gnomon as well as its latitude.  The height of the gnomon and its shadow length are displayed in Earth radius units.  It is a supplemental simulation for an article by Barbara Rovsek  "Calibration of a Horizontal Sundial" in the The Physics Teacher 48 (6), 397-400 (2010).

Noon Shadow model is distributed as a ready-to-run (compiled) Java archive.  Double clicking the ejs_astronomy_Noon Shadow.jar file will run the program if Java is installed.  You can modify this simulation if you have EJS installed by right-clicking within the plot and selecting "Open EJS Model" from the pop-up menu item.

Please note that this resource requires at least version 1.5 of Java (JRE).
1 source code document is available
Subjects Levels Resource Types
- Astronomy Education
= Curricula
- Historical Astronomy
= History of Astronomy
- High School
- Middle School
- Lower Undergraduate
- Instructional Material
= Interactive Simulation
Intended Users Formats Ratings
- Learners
- Educators
- General Publics
- application/java
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Access Rights:
Free access
This material is released under a Creative Commons Attribution 3.0 license.
Rights Holder:
Todd Timberlake
Earth, Eratosthenes, Sun, circumference, gnomon, measure, shadow
Record Cloner:
Metadata instance created April 19, 2010 by Wolfgang Christian
Record Updated:
September 12, 2015 by Wolfgang Christian
Last Update
when Cataloged:
April 19, 2010
ComPADRE is beta testing Citation Styles!

Record Link
AIP Format
W. Christian and T. Timberlake, Computer Program NOON SHADOW MODEL, Version 1.0 (2010), WWW Document, (https://www.compadre.org/Repository/document/ServeFile.cfm?ID=9980&DocID=1605).
W. Christian and T. Timberlake, Computer Program NOON SHADOW MODEL, Version 1.0 (2010), <https://www.compadre.org/Repository/document/ServeFile.cfm?ID=9980&DocID=1605>.
APA Format
Christian, W., & Timberlake, T. (2010). Noon Shadow Model (Version 1.0) [Computer software]. Retrieved June 20, 2024, from https://www.compadre.org/Repository/document/ServeFile.cfm?ID=9980&DocID=1605
Chicago Format
Christian, Wolfgang, and Todd Timberlake. "Noon Shadow Model." Version 1.0. https://www.compadre.org/Repository/document/ServeFile.cfm?ID=9980&DocID=1605 (accessed 20 June 2024).
MLA Format
Christian, Wolfgang, and Todd Timberlake. Noon Shadow Model. Vers. 1.0. Computer software. 2010. Java (JRE) 1.5. 20 June 2024 <https://www.compadre.org/Repository/document/ServeFile.cfm?ID=9980&DocID=1605>.
BibTeX Export Format
@misc{ Author = "Wolfgang Christian and Todd Timberlake", Title = {Noon Shadow Model}, Month = {April}, Year = {2010} }
Refer Export Format

%A Wolfgang Christian %A Todd Timberlake %T Noon Shadow Model %D April 19, 2010 %U https://www.compadre.org/Repository/document/ServeFile.cfm?ID=9980&DocID=1605 %O 1.0 %O application/java

EndNote Export Format

%0 Computer Program %A Christian, Wolfgang %A Timberlake, Todd %D April 19, 2010 %T Noon Shadow Model %7 1.0 %8 April 19, 2010 %U https://www.compadre.org/Repository/document/ServeFile.cfm?ID=9980&DocID=1605

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

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Noon Shadow Model:

Is Based On Easy Java Simulations Modeling and Authoring Tool

The Easy Java Simulations Modeling and Authoring Tool is needed to explore the computational model used in the Noon Shadow Model.

relation by Wolfgang Christian

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