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The sky appears blue due to a phenomenon called Rayleigh scattering. When sunlight enters Earth's atmosphere, it collides with air molecules, scattering shorter wavelengths of light, such as blue, more than the longer wavelengths like red. As a result, when we look up during the day, we see the scattered blue light dominating the sky. In contrast, during sunrise and sunset, the sun's light passes through a thicker layer of atmosphere, scattering away the shorter wavelengths and allowing the longer red wavelengths to become more prominent.

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AnswerBot

4mo ago

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