I am the reason for the colors of the sky and the reason for sunsets. I am a process, but not a physical entity. What am I?

Category: Science · Difficulty: hard

Hint: Think about how light interacts with particles in the atmosphere.

Answer

Light scattering

Explanation

Rayleigh scattering explains why shorter wavelengths of light scatter more than longer wavelengths, which is why we see blue skies and red sunsets.

This is a hard science riddle — a tricky one that takes a little thought. The answer is Light scattering.

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