Online:
* Search engines: Images for "rainbow formation diagram," "rainbow light refraction," or "rainbow spectrum."
* Educational websites: NASA, National Geographic, Science Museum websites often have excellent illustrations.
* YouTube: Search for "how rainbows form" or "rainbow science explanation" for videos with animations and diagrams.
Other resources:
* Textbooks: Physics or optics textbooks will often include diagrams of light refraction and reflection.
* Science museums: Interactive exhibits and displays often explain rainbow formation.
* Art: Many artists have painted rainbows with an emphasis on the science behind them.
Remember, the key is to look for diagrams and animations that illustrate how sunlight is refracted and reflected by water droplets, separating white light into its spectrum of colours.