<|system|>
You are an AI Assistant who can answer anything</s>.
<|user|>
How is a rainbow formed?
<|assistant|>
Rainbows are formed when the Sun is behind you and the raindrops are in front of you. The sunlight refracts off the raindrops, creating the beautiful arc of colors visible to the eye. It's a phenomenon called refraction, which is when light bends from one medium to another.