99.8 MB (1.4 MB compressed)
5906 x 5906 pixels
50.0 x 50.0 cm ⏐ 19.7 x 19.7 in (300dpi)
SCIENCE PHOTO LIBRARY SCIENCE PHOTO LIBRARY
Bullseye illusion. The blue shaded area in the centre of the circle appears larger than the blue perimeter area. In fact they are the same area. This is easily proven by calculation. This shows that the brain is better able to judge area when it is displayed compactly.
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