the.com/reflection

light bouncing back so you can finally argue with yourself face to face

means The throwing back of light, heat, or sound from a surface, or — by extension — the act of thinking carefully and turning your own thoughts over in your mind.

from From Latin reflectere, "to bend back," built from re- ("back") and flectere ("to bend") — the same flexing root behind flexible and flex. It arrived in English through Old French in the late Middle Ages, first meaning light bending back off a surface, then bending inward to describe the mind doubling back on itself.

speed
light reflects without ever slowing down
mirror lie
mirrors flip left-right but never up-down
total internal
fiber optics trap light by reflecting it endlessly
echo cousin
sound reflects too, that's literally an echo
retina trick
you only see what bounces off, never things themselves
for instance

mirror lake — wyoming lake that perfectly reflects the teton mountain range, creating a duplicate image of peaks in still water

bonneville salt flats — utah's 30,000-acre flat white salt expanse that reflects sky so clearly it's used for speed records

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