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As the sun begins to set, the light must travel farther through the atmosphere before it gets to you. More of the light is reflected and scattered. As less reaches you directly, the sun appears less bright. The color of the sun itself appears to change, first to orange and then to red. This is because even more of the short wavelength blues and greens are now scattered. Only the longer wavelengths are left in the direct beam that reaches your eyes.

The sky around the setting sun may take on many colors. The most spectacular shows occur when the air contains many small particles of dust or water. These particles reflect light in all directions. Then, as some of the light heads towards you, different amounts of the shorter wavelength colors are scattered out. You see the longer wavelengths, and the sky appears red, pink or orange.

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Ayden Lebsack

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2y ago
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AnswerBot

1mo ago

A red sunset occurs when the sun is low on the horizon, and its light has to pass through a thicker layer of the Earth's atmosphere. This scattering of light filters out the shorter wavelengths, like blue and green, leaving the longer wavelengths, such as red and orange, to dominate the sky. The result is a beautiful red sunset.

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Q: How a red sunset is formed?
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