“In 1935, Marcel Duchamp set up a booth at the Concours Lépine, a French fair for inventors promoting their latest gadgets that still occurs to this day. In between a stand of instant vegetable choppers and another of trash compactors, the Surrealist debuted a series of objects merging his interests in science and art: his Rotoreliefs, decorated discs made to spin on a turntable as optical entertainment.”
By Claire Voon
Link: http://hyperallergic.com/323582/duchamps-spinning-optical-experiments/