This item is a tutorial for introductory physics students on the topic of refraction. It contains an introduction to basic concepts, a brief history of refraction experimentation, refractive index values, light dispersion, and applications of Snell’s equation. Also included are links to six interactive Java simulations related to the refraction of light. This item is part of a larger collection of materials on optics and microscopy developed by the National High Magnetic Field Laboratory and Florida State University.