Why are There Rainbows?
- Physics explanation of rainbows.
- http://atoc.colorado.edu/~fasullo/pjw_class/rainbows.html

The Rainbowmaker
- Pictures of rainbows, and how to make rainbows.
- http://www.zianet.com/rainbow/home.htm

Circles of Light: The Mathematics of Rainbows
- Explains reflection, refraction, and how together they make a rainbow.
- http://www.geom.uiuc.edu/education/calc-init/rainbow/

Weather Photography
- Many photographs of colourful rainbows from the Australian Severe Weather Photography collection.
- http://www.australiasevereweather.com/photography/

What is a Rainbow?
- Where older students can learn about "one of the most spectacular light shows observed on earth."
- http://eo.ucar.edu/rainbows/

Rainbows
- Gives an explanation of rainbows and how they occur.
- http://www.yorku.ca/eye/rainbow.htm