About

http://weelookang.blogspot.com/2011/10/ejs-open-source-single-slit-diffraction.html

 

Translations

Code	Language		Translator	Run

Credits

Fu-Kwun Hwang - Dept. of Physics,National Taiwan normal Univ. remixed by lookang (This email address is being protected from spambots. You need JavaScript enabled to view it.); lookang; Felix J. Garcia Clemente; Francisco Esquembre

http://iwant2study.org/lookangejss/04waves_11superposition/ejss_model_wave_singleslit2wee03/wave_singleslit2wee03_Simulation.xhtml 

This simulation is work-in-progress now completed. The new 2D scalar elements was used to render the visualization.

the new editor is here 

 https://gitlab.com/ejsS/JavaScriptEditor/release/-/blob/master/JavaScript_EJS_6.0%20BETA_200410.zip

 

Briefing Doc: 🔬Single Slit Diffraction JavaScript HTML5 Applet Simulation Model

Source: Open Educational Resources / Open Source Physics @ Singapore

Main Theme: This source presents an open educational resource in the form of an interactive JavaScript HTML5 applet that simulates single-slit diffraction. This simulation tool is designed for educational purposes, targeting primarily secondary level students learning about waves, superposition, and the principles of diffraction.

Most Important Ideas/Facts:

• Educational Focus: The simulation is aimed at aiding the understanding of single-slit diffraction, a key concept in wave physics. It provides a visual and interactive way to explore the phenomenon, likely more engaging than static textbook diagrams.
• Open Educational Resource: This simulation is open-source and freely available online. This promotes accessibility and wider adoption by educators and learners globally.
• Technical Specifications: The simulation is built using EasyJavaScriptSimulation and is compatible with various platforms including:
• Web browsers
• Android/iOS devices
• Windows/MacOSX/Linux operating systems
• Collaboration and Development: The resource highlights the collaborative nature of open-source projects. It credits multiple contributors, including Fu-Kwun Hwang, lookang, Felix J. Garcia Clemente, and Francisco Esquembre.
• Ongoing Development: The webpage states that the simulation is "work-in-progress now completed" and provides links to the new editor used for development. This suggests continuous improvement and updates to the resource.

Key Quotes:

• "This simulation is work-in-progress now completed. The new 2D scalar elements was used to render the visualization."
• "Contents are licensed Creative Commons Attribution-Share Alike 4.0 Singapore License . Separately, for commercial use of EasyJavaScriptSimulations Library, please read https://www.um.es/fem/EjsWiki/Main/EJSLicense and contact This email address is being protected from spambots. You need JavaScript enabled to view it. directly."

Potential Use Cases:

• Classroom Demonstrations: Educators can utilize the simulation to visually demonstrate single-slit diffraction in real-time, manipulating variables to show their impact on the diffraction pattern.
• Student Exploration: Students can interact with the simulation independently, exploring the relationships between slit width, wavelength, and the resulting diffraction pattern.
• Remote Learning: The online nature of the resource makes it suitable for remote learning environments, enabling students to access and learn from the simulation regardless of location.

Overall, this resource appears to be a valuable tool for physics education. Its interactive nature, open accessibility, and ongoing development make it a strong contender for educators seeking to enhance their teaching of wave phenomena.

 

Single Slit Diffraction Study Guide

Short Answer Questions

1. What is the primary phenomenon that the "Single Slit Diffraction JavaScript HTML5 Applet Simulation Model" aims to demonstrate?
2. Explain the role of superposition in the context of single-slit diffraction.
3. How does the "Single Slit Diffraction" simulation utilize the new 2D scalar elements?
4. What programming language is the basis of the Easy JavaScript Simulations (EJS) used in this model?
5. Describe the functionality of the "embed" feature provided for the simulation model.
6. List three operating systems compatible with the "Single Slit Diffraction" simulation.
7. Who are the credited developers and contributors to this specific simulation model?
8. What is the significance of the Rayleigh criterion in the study of single-slit diffraction?
9. Where can one find the introductory page providing context for this simulation?
10. Explain the purpose of the "accordionfaq" section on the webpage.

Short Answer Key

1. The simulation primarily demonstrates the phenomenon of single-slit diffraction, where light waves passing through a narrow slit spread out and create an interference pattern.
2. Superposition dictates how the individual waves emanating from different points within the slit interfere with each other, leading to the characteristic bright and dark fringes in the diffraction pattern.
3. The new 2D scalar elements are used to render the visualization of the diffraction pattern, making it visually engaging and informative.
4. The Easy JavaScript Simulations (EJS) are based on the JavaScript programming language, making them accessible and readily executable in web browsers.
5. The "embed" feature allows users to integrate the simulation model directly into a webpage, facilitating the use of the model in educational resources and other online platforms.
6. The simulation is compatible with Windows, MacOSX, and Linux operating systems, ensuring broad accessibility across various devices.
7. The credited developers include Fu-Kwun Hwang, lookang, Felix J. Garcia Clemente, and Francisco Esquembre. Their contributions are acknowledged on the webpage.
8. The Rayleigh criterion defines the minimum angular separation between two point sources of light that can be resolved as distinct objects. It is crucial in understanding the limits of resolution in optical systems influenced by diffraction.
9. The introductory page providing context for this simulation can be found at http://weelookang.blogspot.com/2011/10/ejs-open-source-single-slit-diffraction.html.
10. The "accordionfaq" section serves as a frequently asked questions (FAQ) section, offering troubleshooting tips and guidance for common issues encountered by users.

Essay Questions

1. Discuss the historical development of the theory of single-slit diffraction, highlighting key experiments and scientists involved.
2. Explain how the width of the slit and the wavelength of the incident light affect the observed diffraction pattern.
3. Compare and contrast single-slit diffraction with double-slit diffraction, emphasizing the differences in the resulting interference patterns.
4. Analyze the practical applications of single-slit diffraction in scientific instruments and everyday phenomena.
5. Critically evaluate the effectiveness of the "Single Slit Diffraction JavaScript HTML5 Applet Simulation Model" as an educational tool for understanding wave optics concepts.

Glossary of Key Terms

• Diffraction: The bending of waves, such as light or sound waves, as they pass around an obstacle or through an aperture.
• Single-slit diffraction: A phenomenon that occurs when light passes through a narrow slit, producing an interference pattern of alternating bright and dark fringes.
• Superposition: The principle that when two or more waves overlap, the resulting displacement at any point is the sum of the displacements of the individual waves.
• Interference: The interaction of waves, resulting in either reinforcement (constructive interference) or cancellation (destructive interference).
• JavaScript: A high-level, interpreted programming language commonly used for creating interactive web content.
• HTML5: The fifth and current major version of HTML, the markup language used for structuring and presenting content on the World Wide Web.
• Applet: A small application, typically designed to be embedded within a webpage or another application.
• Simulation: A computer program or model that imitates a real-world process or system.
• Rayleigh criterion: The criterion that states that two point sources of light are just resolvable when the center of the diffraction pattern of one source is directly over the first minimum of the diffraction pattern of the other source.
• Open Educational Resources (OER): Teaching, learning, and research materials in any medium that reside in the public domain or have been released under an open license that permits no-cost access, use, adaptation, and redistribution by others with no or limited restrictions.
• Scalar: A quantity that has only magnitude and no direction.

https://weelookang.blogspot.com/2020/04/single-slit-diffraction-javascript.html

Sample Learning Goals

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For Teachers

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Research

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 Version:

1. https://weelookang.blogspot.com/2020/04/single-slit-diffraction-javascript.html

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Single Slit Diffraction Simulation FAQ

What is Single Slit Diffraction?

Single slit diffraction is a phenomenon that occurs when a wave, like light, passes through a narrow slit. Instead of continuing in a straight path, the wave spreads out and creates a pattern of bright and dark bands on a screen placed behind the slit. This is because the wave diffracts, bending around the edges of the slit and interfering with itself.

What does the Single Slit Diffraction simulation show?

This simulation visually demonstrates the wave diffraction phenomenon. It shows how a wave (like light) passes through a single slit and creates an interference pattern on a screen behind it. You can adjust parameters like slit width and wavelength to see how they affect the diffraction pattern.

How does slit width affect the diffraction pattern?

A narrower slit leads to a wider diffraction pattern. This is because a narrower opening forces the wave to bend more, resulting in greater spreading and wider bands on the screen.

How does wavelength affect the diffraction pattern?

A longer wavelength produces a wider diffraction pattern. Longer wavelengths diffract more easily, leading to greater spreading and wider bands on the screen.

What are the learning goals of this simulation?

The simulation aims to help students:

• Understand the concept of wave diffraction.
• Visualize how waves diffract through a single slit.
• Explore the relationship between slit width, wavelength, and the resulting diffraction pattern.
• Analyze the interference pattern created by single slit diffraction.

What devices can I use to access this simulation?

The simulation is built using HTML5 and JavaScript, making it compatible with various devices. You can access it on:

• Smartphones (Android and iOS)
• Tablets (including iPads)
• Laptops (Windows, MacOSX, Linux, Chromebooks)
• Desktops (Windows, MacOSX, Linux)

Where can I find the source code for this simulation?

The source code and further details about the simulation development can be found at the following links:

• New Editor Download
• Simulation Development Blog Post

Are there any additional resources available?

Yes, the website provides links to other simulations, educational resources, and videos related to various physics concepts, including wave phenomena, mechanics, and more. Explore the website to discover additional learning materials.