These web pages, authored and curated by David Stern, provide an introduction to the aurora and the physical mechanisms that cause it. They include details about auroral imaging, particularly from satellites, and the...

All About Circuits is a website that “provides a series of online textbooks covering electricity and electronics.” Written by Tony R. Kuphaldt, the textbooks available here are wonderful resources for students, teachers,...

Written by Tony R. Kuphaldt and Jason Starck, this chapter of All About Circuit's second volume on Alternating Current describes complex numbers: "In order to successfully analyze AC circuits, we need to work with...

This site contains various applets and animations of physical processes, demonstrating various ideas in waves, optics, mechanics, and thermodynamics. The site also contains information on the theory behind diffraction...

This paper, presented at the 2001 Physics Education Research Conference, offers a new way to approach homework problems in electrostatics through the use of “bridging exercises” as part of students’ homework. These...