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Handout
Georgia State University

Georgia State University: Hyper Physics: Total Internal Reflection

For Students 9th - 10th
This physics department site provides a definition and explanation of the phenomenon of total internal reflection. Includes a diagram and an equation for calculating the critical angle for light approaching a surface.
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Handout
Boston University

Bu: Optics: Geometric Optics

For Students 9th - 10th
Several short descriptions of demonstrations which illustrate principles of geometric optics (many of which focus upon refraction).