Curated OER
Supernova Chemistry
Using spectroscopes, high school astronomy, physics, or chemistry learners observe emission spectra from several different sources. This stellar NASA-produced lesson plan provides terrific teacher's notes and a student handout. Make sure...
Physics Classroom
The Physics Classroom: Light Absorption, Reflection and Transmission
This tutorial explains light absorption, reflection and transmission in a clear and concise manner. Provides a "Check Your Understanding" section as well as additional links on color and light.