Floor 1 | Mirrors in Mind
Rotating Mirrors
No mysteries with the flat 180° mirror: rotate it and your image stays straight in front of you.
The two mirrors joined at a 90° corner give you the sight-corrected, or ‘tailor’s mirror’, image – you as the rest of world sees you, not right-left reversed. Rotate the mirrors and your image turns full circle, at double speed. Look into the angle where the two mirrors join, and close one eye: which eye closes in your reflection? Surprise!
The two mirrors joined at 60° are at a critical angle: the image you see has been reflected three times, off the first mirror onto the second, off the second back onto the first, and off the first back towards you. That’s 60° three times over: 180°. So your image appears exactly as in the flat 180° mirror, directly behind the border where the mirrors touch: it’s reversed right-left and does not turn when you rotate the mirrors.