The circular plate rotates rapidly, showing that the plate is white, indicating that daylight is synthesized by the above seven colored lights. This is the first attempt to find the law of color synthesis. also called "seven color plate"". Newton's instrument for the description of daylight. The round plate is divided into seven sections, and each of them is painted with seven colors: red, orange, yellow, green, cyan, indigo and violet.
Material: wood, iron.
Disc diameter 20cm;
Backplane: 21*17*1.8cm.
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