The conversation between human and AI assistant.
Why is the sky is blue?
Can you tell me why the sky is blue?
The sky appears blue because of a phenomenon called Rayleigh scattering. When sunlight enters Earth's atmosphere, it collides with gas molecules and scatters in all directions. Blue light has shorter wavelengths than other colors in the spectrum, so when it collides with gas molecules, it is scattered more than other colors, which makes it visible to our eyes.