It’s just an illusion

Found this in the past, somewhere out there on the net…

Look at the dot in the centre and move your head towards or away from the image – the surrounding circles seem to move.

Spinning circles

Anyone know why? Could you use such effects to make advertisements, or road-safety signs, more noticeable?

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1 Comment

Interesting. Is the raised relief, with the light source apparently rotating around the centre, key to this illusion?

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