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Find out what conditions you need to see fire rainbows
An in-depth study of the mathematics involved in the study of rainbows. For advanced students only.
Why do you see rainbows in soap bubbles or on oil and water? Explanation of thin film interference from HowStuffWorks.com
An answer from PhysLink.com about thin film interference, whic explains why you see rainbow colours in oil.
This site aims to further our understanding of light and the rainbow.
Non-mathematical explanation of colours seen in an oil film, caused by light interference. Nice diagram and accompanying photograph.
In a rainbow or the separation of colors by a prism we see the continuous range of spectral colors (the visible spectrum).
An interesting but straightforward page about iridescence, explaining how interference works to create rainbows on oil on a wet pavement, with links to pages about butterflies, beetles and peacocks.
An excellent guide to atmospheric optics: meteorological effects such as rainbows, halos and red sunsets, explained using basic physics.
This site introduces the idea that light can be refracted into all the colours of the rainbow. The site uses this idea to introduce the idea of spectrographs used in astronomy.
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