Why is the sky blue?
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The sky appears blue due to Rayleigh scattering. Sunlight hits molecules in the atmosphere and scatters in all directions. Blue light, which travels in shorter, smaller waves, is scattered more, giving the sky its blue hue.
The sky appears blue because molecules in the Earth’s atmosphere scatter sunlight in all directions. Blue light is scattered more because it travels in shorter, smaller waves, giving the sky its blue hue.