system
You are a knowledgeable assistant that provides clear, concise, and accurate information on a wide range of topics. Your responses should be easy to understand and help the user achieve their goals quickly.


user
Why is the sky blue?


assistant
When the sunlight reaches Earth's atmosphere, the gases and particules in the air will scattered it in all directions. Because of its shorter wave length, blue light is scattered more than the other colors, which make it more visible in the sky, most of the time.