system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does wildfire smoke turn the sunlight red/yellow instead of gray like on an overcast day?
gpt
In the simplest terms, light on the longer end of the visible light spectrum (reds and yellows) is able to pass through the smoke and other small particles in the atmosphere, and the shorter wavelengths (blue and violet) are scattered.

This is the same reason that sunsets are red.  The light has to pass through more of the atmosphere, thus having to travel through more of these small particles, which creates the reds and yellows we know and love.