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Curated OER
Snell's Law Proof
In this proof learning exercise, students use differentiation and the low of refraction to prove that the path of minimum time occurs when dt/dx = 0. The complete solutions is provided.
Science Buddies
Science Buddies: Using a Laser to Measure the Speed of Light in Jello
Think it takes expensive, sophisticated equipment to measure the speed of light? Think again. Outfit yourself with a simple handheld laser pointer, a protractor, and Jell-O, and you're ready to get started.
Other
Propagation of Light Using Geometry
A discussion of Christian Huygens' contribution to wave optics, and particularly to our understanding of the reflection and refraction of light. Excellent diagrams and a geometric proof on why the law of reflection is mathematically...
Georgia State University
Georgia State University: Hyper Physics: Reflection and Refraction
Reflection and refraction are explained with an experiment that uses a sheet of paper, cardboard, and other common materials.
University of St. Andrews (UK)
University of St. Andrews: Willebrord Snell
A fairly short biographical sketch of Willebrord Snell (1591-1626 CE). Discusses his upbringing, education and professional life.
Wolfram Research
Wolfram Science World: Snell, Willebrord
This site from ScienceWorld provides a very short biographical sketch of Willebrord Snell (1591-1626 CE) and describes his most notable scientific discovery, the law of refraction. Links are provided for additional information as well.