This is not a spiral

Talking of art, feast your eyes on this image from a really interesting website called CosmusUp:

Spiral

Picture courtesy of CosmosUp

It’s a stunningly convincing optical illlusion. You can see how it works if you draw an horizontal line through the centre. The small black and white squares at the corners of the larger ones are aligned differently on the inside and outside of each ring and alternate in orientation as you go around. This creates a pattern of black squares that appears to bend, creating the impression of an anti-clockwise spiral.

One Response to “This is not a spiral”

  1. Basically a circular version of the Bristol Cafe Wall illusion (but none the less neat for that).

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