Fraser spiral illusion
The Fraser spiral illusion is an optical illusion that was first described by the British psychologist Sir James Fraser (1863 – 1936) in 1908. The illusion is also known as the false spiral, or by its original name, the twisted cord illusion. The overlapping black arc segments appear to form a spiral; however, the arcs are a series of concentric circles. The illusion is augmented by the spiral components in the checkered background.
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Fraser spiral illusion
The Fraser spiral illusion is an optical illusion that was first described by the British psychologist Sir James Fraser (1863 – 1936) in 1908. The illusion is also known as the false spiral, or by its original name, the twisted cord illusion. The overlapping black arc segments appear to form a spiral; however, the arcs are a series of concentric circles. The illusion is augmented by the spiral components in the checkered background.
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De Fraser-spiraal is een optis ...... illusie ook wel Valse spiraal.
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Die Fraser-Spirale ist eine op ...... rierten Hintergrund verstärkt.
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La spirale de Fraser tient son ...... s et des dérivations fictives.
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The Fraser spiral illusion is ...... s in the checkered background.
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680,678,642
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De Fraser-spiraal is een optis ...... illusie ook wel Valse spiraal.
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Die Fraser-Spirale ist eine op ...... rierten Hintergrund verstärkt.
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La spirale de Fraser tient son ...... llusion des cordes emmêlées ».
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The Fraser spiral illusion is ...... s in the checkered background.
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Fraser spiral illusion
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Fraser-Spirale
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Fraser-spiraal
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Spirale de Fraser
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