Welcome to the Physics and Astronomy portal. This portal is intended to be a user-friendly guide to physics and astronomy content on Wikiversity for pre-school, primary and secondary levels. For a more specialist and advanced portal, please refer to the School of Physics and Astronomy.
This diagram shows how light is refracted to create the illusion of a pencil being bent by dipping in water. 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.