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Why does the image in the mirror flip left and right instead of upside down? Is this a physical property of the mirror itself or a perceptual illusion of the human brain?

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为什么镜子里的影像会左右翻转，而不是上下颠倒，这是镜子本身的物理特性，还是人类大脑的感知错觉？

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First recorded Sep 3, 2026, 10:48 PM CST · latest Sep 3, 2026, 10:48 PM CST. Ranks reflect attention on each platform.

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DayPlatformBest rankLast rank
2026-09-03Zhihu Hot List#14#14
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