Why Is The Sky Blue?
5. Red Sunsets
The sky is not always blue, of course. At night, it is black, which is basically because there is insufficient light because the suns rays are being blocked by the rest of our planet. At sunsets, you will notice the sky will become orange or even red in color. In some instances, it will even turn a pink/purple color.
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The reason for this is particles in the air that are scattering the light. For examples, when you are on the coast, you are more likely to find that the sky will be red at sunset because of the increased number of salt particles that are in the air.
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