Oswego City School District
Regents Exam Prep Center: Intuitive Notion of Line Symmetry and Plane Symmetry
Definitions are provided line of symmetry, line symmetry, and plane symmetry, and several nice examples are provided that illustrate these definitions.
Other
Escolar.com: La Luz
A brief summary and illustrations of light and how the lights rays are reflected and bent.
British Library
British Library: The Leonardo Notebook
Page through one of Leonardo's notebooks, in which he works out his observations about weights, measures, reflections, and similar material matters. Interesting examples of the master's characteristic "mirror writing" and of his...
Pennsylvania State University
Penn State Graduate Program in Acoustics: Reflection From Mirrors
Included here are illustrations of reflections from a plane mirror, a concave mirror and a convex mirror.