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Knowledge Cats Dirty Minds
Hidden objects Boats the tag: Cognitive Illusions

Knowledge

Facts, science and history of optical illusions.
See all the articles or scroll down to see what you came for.

Rorscharch inkblot

What Optical Illusions Reveal about You

Forced perspective image Pisa tower

Forced Perspective

Superior mirages

Inferior and Superior Mirages, and Fata Morgana

Checkered shadows

checkered shadows under street light

Source/credit: Reddit

Why are there checkered shadows under LED street lights?

These pixelated or checkered shadows occur because modern LED street light fixtures use a grid array of multiple individual LED diodes rather than a single light source. Light from the different diodes overlap, creating different shades.

More optical illusions:

Cat Head
Shoebill?
Broken Chair
North Sentinel Tribesman
Beach at Night
Snake cat
Big Daddy
Thats the cat's pajamas
  • Pareidolia
  • Physical illusions
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A headless figure

Headless figure

People