People have always been curious about rainbows. They have expressed their curiosity in many ways. Some people tell stories. A pot of gold at the end of the rainbow is a popular story in Europe and North America. Other interpretations suggest that the rainbow is a sign of hope.
Scientists tell a different story.
Scientists say that sunlight looks white but is not really white because it contains every possible colour. Prisms can break up white sunlight. A drop of water can be a prism. Here's how it works. When light shines through a drop of water or prism, it bends or is refracted inside the droplet.