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为什么雪是白色的？

雪的白色是由于光线在雪晶体的内部多次折射和反射所致。雪晶体是由水蒸气凝结而成的冰晶，其表面非常粗糙。当光线照射到雪晶体上时，会在其中反射和折射多次，使得光线在物体表面扩散并散射到周围。这种多次反射和折射导致雪看起来呈现出白色，因为白光中的各种颜色经过散射混合在一起。

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