Today as I was taking a shower I noticed that my bathroom mirror was starting to fog up. Of course, I had always seen this happen, ever since I was young, but I had never thought about why this happens. Every time we take a hot shower, the mirror will fog up because of condensation. When the hot water starts to warm the air, the air becomes saturated air. When it comes into contact with the mirror (which is most likely to have a lower temperature than the saturated air), the moisture in the air leaves it and stays on the surface of the mirror.
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