Weather Wonders: Why is the sky blue? – kwwl.com

Blue Sky

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Have you ever stopped and wondered why the sky is blue? No, it’s not because of the reflection of the ocean! Let’s dive deeper.

White Light Through a Prism

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First we have to talk about sunlight. It appears white, but when reflected through a prism you see red, orange, yellow, green, blue, and violet. Ice crystals and water droplets act as prisms in the sky.

Visible Light Wavelengths

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Visible light has many different wavelengths when scattered about by prisms or objects. Light waves can be short and choppy, or long and not as energetic.

Rayleigh Scattering

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The molecules of Earth’s atmosphere do a great job at scattering light around. We see a blue sky because the blue light wave is shorter in length and can be scattered about more than the other colors. This process is known as Rayleigh scattering and Yes, it’s as simple as that!