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为什么太阳升起的时候会变红呢？

太阳在升起的时候会经过大气层的较低部分，这时候光线会通过大气层中的气体分子散射，散射光中的蓝光被散射得更多，而红光受到的散射相对较少，所以我们看到的太阳在升起时呈现出红色。

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