We all love a blue sky. But what makes it blue? Let's talk visible light and Rayleigh scattering!

Add Yahoo as a preferred source to see more of our stories on Google. The sky isn't just blue by chance. It takes all the colors of the rainbow for us to see it that way. It happens because of ...

Before we can understand why the sky looks bluer in the fall, it's important to first know why the sky appears blue in the first place. The sun emits white light, and due to Rayleigh scattering (the ...

Carolina or Duke blue? Either way, the sky is bluer in fall Look up! The sky takes on an extra-blue hue in the fall, because of low humidity and an increased amount of Rayleigh scattering.

The color of the leaves isn't the only thing that changes in autumn. Have you ever looked up on a crisp fall day and noticed how brilliant and clear the blue sky is? That's not just your imagination — ...

The sky takes on an extra-blue hue in the fall, because of low humidity and an increased amount of Rayleigh scattering.