What Causes the ‘Pink Sky’ at Sunrise?

At sunrise, the sky turns pink because the sunlight has to travel a longer path through Earth’s atmosphere. This makes the blue light scatter away, and the red and pink colors stay behind. It's like when you shine a flashlight through a glass of water, some colors go out, and others stay inside.

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Examples

It’s like when you shine a light through a glass of water, some colors go out, others stay in.
Imagine a flashlight shining through a foggy room, the light becomes more visible as it travels further.
If your friend is wearing red and blue glasses and walks into a room with bright white lights, the red parts look brighter than the blue ones.

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Categories: Environment · sunrise,light scattering,atmosphere,optics