Wolfram Research
Wolfram Math World: Reflection
This site defines reflection, separates reflection into two categories of amphichiral and chiral. The site also gives formulas used in reflective symmetry including point-plane distance, position of reflected points and has links to...
Physics Classroom
The Physics Classroom: Reflection and the Ray Model of Light
A four-lesson tutorial on the reflection and the ray model of light. These complete tutorials include informational text, interactive activities, animations, and quick, interactive comprehension questions.
Exploratorium
Exploratorium: Science Snacks: Your Father's Nose
After constructing a frame with a mirror made of horizontal strips, explore what your face would look like if it was made up of half of someone else's.
Boston University
Bu: Optics: Geometric Optics
Several short descriptions of demonstrations which illustrate principles of geometric optics (many of which focus upon refraction).
University of South Florida
Fcat: Reflection: Teacher Notes
Students use the coordinate plane to investigate how reflections affect geometric shapes. Can be used by the student, but is also a great lesson plan idea for teachers.
Physics Classroom
The Physics Classroom: Refraction/ray Model of Light: Image Formation Revisited
Students take an in-depth look at the physics behind image formation.
Other
Geometric Optics
This site provides a very brief definition to geometric optics, and includes links to related information.
Science Buddies
Science Buddies: Study Chirality With a Homemade Polarimeter
Some molecules can be either left- or right-"handed." The left- and right-handed molecules have the same number and type of atoms, and their chemical structures look identical, but they are actually mirror images of each other. Many...
Other
Drexel University: Archimedes
An extensive site dedicated to the life and legacy of the Greek mathematician Archimedes. Content includes a timeline of Archimedes' life, an overview of several of his inventions, and numerous anecdotes isolating various moments in his...
Physics Classroom
The Physics Classroom: Reflection and the Ray Model of Light: Ray Diagrams
This illustrated physics tutorial serves as a step-by-step guide to drawing ray diagrams. It includes an opportunity for students to practice and check their answers.
Curated OER
Diamond
Gives information on the different kinds of symmetry operations, including mirror planes, rotational axes, and rotoinversion axes.