In this illustrated physics tutorial, students learn about sound wave behaviors and apply them to the reflection, diffraction, and refraction of sound waves.

This physics department site provides a definition and explanation of the phenomenon of total internal reflection. Includes a diagram and an equation for calculating the critical angle for light approaching a surface.

Through illustrated practice problems and video clips, students learn about polarization of light.

Extensive information about how waves behave in an elastic medium. Covers different types of waves, their characteristics and behavior, the anatomy of the ear, the speed of sound in different media, the parts of a wave, and wave phenomena.

This animated essay from the NOVA Web site examines the design of Galileo's refracting telescope and Sir Isaac Newton's reflecting telescope.

Students can see light reflected and refracted in this demonstration. They will also discover the total internal reflection of light.

Discusses in detail the grading of diamonds, as well as briefly discussing their structure, physical properties, and historical background. Accompanied by clear illustrations.

"How Do We Know Light Behaves as a Wave?" An answer is provided in this discussion of the polarization of light and the use of Polaroid filters in sunglasses. The four methods discussed on this page are: polarization by transmission,...

This page explains in fairly simple terms the basics of telescopes. It includes information on the various types of telescopes and the factors people use to select the correct telescope for them. Meade is a leading telescope manufacturer.