Mystery #2Tier 2physics / light
Why does a mirror swap left and right but not up and down?
Wave your right hand at a mirror and the person in it waves back with their left. Yet your head still points up and your feet still point down: the mirror doesn't turn you upside down. Why would a mirror flip left-and-right but leave up-and-down alone?
Your guess
What's your hunch: does the mirror really swap left and right, or is something else going on?
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