Erlebnisland Mathematik | Technische Sammlungen Dresden | Junghansstraße 1-3 | 01277 Dresden
Erlebnisland Mathematik

Shadow Dancer

Does the dancer spin to the right or to the left?

Since we see only her shadow, our brain does not receive sufficient information for determining the spinning direction. The brain decides for one of the two directions, but this choice varies among different viewers. Once the decision is made, it is difficult to force oneself to reverse the direction.

The author of the graphics is Nobuyuki Kayahara.

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