prompt: How is a rainbow formed?
chosen: How is a rainbow formed?
chosen: user
chosen: 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.
chosen: assistant
rejected: How is a rainbow formed?
rejected: user
rejected: assistant