Light and Optics http://micro.magnet.fsu.edu/optics/tutorials/
Making Waves http://amazing-space.stsci.edu/resources/explorations/light/ems-frames.html
Eye Anatomy http://www.stlukeseye.com/Anatomy.asp
The Electromagnetic Spectrum http://imagers.gsfc.nasa.gov/ems/ems.html
Holt Science Links http://www.Scilinks.org
NASA Space Place http://spaceplace.jpl.nasa.gov/en/kids/misrsky/misr_sky.shtml
Animal Eyes http://www.ebiomedia.com/Eyes/Eye-Eye-Eye-Eye-Questions-about-Eyes.html
Our Infrared World Gallery http://coolcosmos.ipac.caltech.edu/image_galleries/ir_portraits.html
Light and EMS quiz http://www.quia.com/tq/472487.html
The Science of Light http://www.learner.org/teacherslab/science/light/index.html
How Laser Pointers Work http://www.thetech.org/exhibits/online/lasers/