You Can Never Reach the End of a Rainbow
A rainbow is an optical illusion, not a physical object, formed by sunlight reflecting and refracting through water droplets. Its perceived location changes with your perspective, moving as you move.
Topic
Refraction
2 facts
Discover refraction, the bending of light as it passes through different mediums. Explore how this phenomenon creates optical illusions and makes lenses work.
Light Slows Down When Traveling Through Water or Glass
Light travels fastest in a vacuum (about 299,792 kilometers per second). When it passes through denser mediums like water or glass, it interacts with the atoms, causing it to slow down temporarily.