Optical Illusion Turning Postcard, Golden Ratio
A transparent layer printed black connected with the postcard in the center allows it to rotate, the effect is a moving illusion!
Throughout history, the ratio for length to width of rectangles of 1.618033988 74989484820 has been considered the most pleasing to the eye. This ratio was named the golden ratio by the Greeks. In the world of mathematics, the numeric value is called "phi" (φ), named for the Greek sculptor Phidias. The space between the collumns form golden rectangles.
White Pearl paper 300 gr, digital print.
MADE IN ATHENS.