A circle composed of equal amounts of light and shadow is cast on a wall. To create this phenomenon, a spotlight shines on the right side of a semi-elliptical mirror, which is placed perpendicular to the wall. The light is thus reflected back to form the right half-circle, the other half-circle consisting of the shadow cast by the semi-ellipse.
|Mirror, stainless steel, halogen bulb|
|80 x 80 x 60 cm|