Explains what diffraction and interference are, and what kinds of patterns are produced when light waves pass through a single slit, a double slit, or a diffraction grating. Includes three problems for students to try, with solutions...

A discussion of refraction and its application to sound waves. Using analogies, graphics and real-life applications, this page and those that accompany it explain why and when sound waves bend.

This site from the Southampton Oceanography Centre provides an easy-to-understand definition and schematic of a Rossby Wave in the Introduction hyperlink. Also includes information on how to observe Rossby waves in satellite data and a...