Scholastic
Scholastic: Study Jams! Science: Light Absorption, Reflection, & Refraction
A video and a short quiz on the properties of light.
Physics Classroom
The Physics Classroom: Sound Waves & Music: Reflection, Refraction, Diffraction
In this illustrated physics tutorial, students learn about sound wave behaviors and apply them to the reflection, diffraction, and refraction of sound waves.
Pennsylvania State University
Kettering University: Vibration & Waves
A short tutorial providing general information about waves, their categories, properties and behaviors. Includes several animations and some practice questions with answers.