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Welcome to Wikiversity
with 27,722 learning resources and growing.
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"When the pupil is ready to learn, a teacher will appear." -Zen koan (discuss)

Wikiversity is a Wikimedia Foundation project devoted to learning resources, learning projects, and research for use in all levels, types, and styles of education from pre-school to university, including professional training and informal learning. We invite teachers, students, and researchers to join us in creating open educational resources and collaborative learning communities. To learn more about Wikiversity, try a guided tour or start editing now.

Today's Featured Project
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Nonlinear finite elements is a course of about 150 to 200 pages designed by mechanical engineering researcher User:Banerjee. It is the best developed of a number of related mechanical engineering projects created by the same user - other projects include Introduction to Elasticity (about 100 pages) and Waves in composites and metamaterials (a 25-page lecture series). Nonlinear finite elements contains a lecture series, homework assignments and solutions. Course description: "an introductory course on nonlinear finite element analysis of solid mechanics and heat transfer problems. Nonlinearities can be caused by changes in geometry or be due to nonlinear material behavior. Both types of nonlinearities are covered in this course. The course aims to (1) provide the mathematical foundations of the finite element formulation for engineering applications (solids, heat, fluids) and (2) expose students to some of the recent trends and research areas in finite elements." For related materials, see also continuum mechanic, finite element analysis and nonlinear finite elements (category).

Community
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Start editing, join the discussion (on the colloquium) and become part of the Wikiversity community! For real-time advice or assistance, you can join our Wikiversity's IRC channel, or our mailing list, or add learner questions on our help desk. The community portal is a listing of notices, projects, activities, guidelines and resources, and learn more about us through the history of Wikiversity.
The Formation of a Rainbow
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1. Spherical droplet
2. Places where internal reflection of the light occurs
3. Primary rainbow
4. Places where refraction of the light occurs
5. Secondary rainbow
6. Incoming beams of white light
7. Path of light contributing to primary rainbow
8. Path of light contributing to secondary rainbow
9. Observer
10. Region forming the primary rainbow
11. Region forming the secondary rainbow
12. Zone in the atmosphere holding countless tiny spherical droplets.
Diagram showing how primary and secondary rainbows are formed. Click on the image for a full size version which you can freely re-use and modify. Print it and use it for your lessons, integrate it into your pages on Wikiversity, or use it in other learning resources and websites. Use the links below to find more images like this one.

Guide to rainbow media - Prism images - Light images
Mechanics images - Electromagnetism images - Optics images - Atomic physics images
Images relating to physics in general


This image is a part of the Educational Media Awareness Campaign, raising awareness among educators about the availability and usage of millions of free internet media in education.
Development
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At Wikiversity we are committed both to conventional learning patterns and resources, and to innovation and experimentation. Wikiversity is open to reconceptualising how web education can occur and how open educational resources can be made, and we are open to new ideas about the use of the Mediawiki environment for learning and research. Check out and help develop our learning projects and how learning works on Wikiversity, see how Wikiversity can help you, and explore how to get involved and start adding content. The sandbox server project is also a centre of learning experimentation.

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Wikiversity's sister projects

Wikiversity is hosted by the Wikimedia Foundation, a non-profit organization that also hosts a range of other multilingual and free-content projects:

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