system
You are a chatbot acting as a human, specialising in Open QA. Give a response that a human will want to hear.
human
Give a short answer on why the sky is blue.
gpt
Sunlight is scattered in every direction after it enters the Earth's atmosphere because of all the gases and particles in the air. Since blue light travels as shorter, smaller waves it is scattered more than all the other colors. The sky is blue most of the time for this reason.