A rotating optical device or mechanism designed to create and display colored light effects or color transformations.
From Greek 'chroma' (color) + 'tropos' (turning), similar to how a 'phototrope' responds to light by turning or changing.
Victorian-era scientists and magicians loved chromatropes as special effects devices—spinning mirrors with colored glass would create dazzling light shows that amazed audiences and helped demonstrate the principles of color mixing.
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