Rainbows are optical illusions that happen when light bends in water droplets and splits into different colors. Those colors are red, orange, yellow, green, blue, indigo, and violet. White light is made out of all these colors. When it rains, lots of water droplets are in the sky. The Sun shines through these water droplets. As light enters the water droplet, it slows down and bends or splits into the different colors of the rainbow. Then, these millions of water droplets reflect the image of the rainbow into our eyes. Rainbows are actually full circle!! You can only see the full rainbow from tall building, an airplane, or a mountain.
