VERY interesting physics puzzle

Why does the mirror reflect from left to right? Why doesn't it show things upside down? In other words, what is so special about the horizontal transform?

This is a question physics majors often ask the new students... quite a perplexing one at first. It turns out the solution is quite easy, and what better than having Richard Feynman explain it to us in his easy style?


Read his autobiography, by the way. Spectacular.

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