A comprehensive review of optics and imaging technology. This website contains links to tutorials about optical microscopy, stereomicroscopy, fluorescence filters, and digital imaging.
Levels: High School
This site contains a comphensive selection of java applets regarding prisms, lasers, the human eye, mirrors, birefringence, airy pattern formation, electromagnetic radiation, filters, polarizers, and many many more.
Primary additive and subtractive colors
Levels: Middle School, High School, and Undergrad