Three arc illusion

Three arc illusion

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This image is part of the feature Illusions

Credit: SCIENCE PHOTO LIBRARY

Caption: Three arc illusion. An equal portion of each of the three arcs is highlighted to show that they all come from circles of the same radius. Image T478/459, which is identical to this image except for the highlighting, shows that this is not necessarily a natural conclusion when we view different arcs of identical circles.

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Keywords: ambiguity, ambiguous, circle, circles, illusory, neuroscience, optical illusion, panoramic, perception, psychology, radius, three arc illusion, trick, trickery vision, vision, visual, visual trick

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