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The visual ambiguity created by an ellipse is a theme Eliasson has explored repeatedly over the years. The mechanism is beguilingly simple: an ellipse appears to be a circle viewed in perspective, and a sequence of ellipses creates the illusion of a disc rotating in space. For this work, the hand-blown coloured glass mirrors have been organised in a ring that progresses from circles to flattened ellipses and back again. The appearance of transparency where the segments overlap is simulated by inserting glass panes of slightly different shades, and the arrangement of tones corresponds to the colour wheel of primary and secondary colours well known from art history, picking up on Eliasson’s ongoing investigation of colour theory in other media.

Silvered coloured glass (rainbow spectrum), composite board