Newton’s disc is a cardboard disc with different sectors colored red, orange, yellow, green, blue, indigo and violet. When turned quickly, the retina receives the sensation of the seven colors of the spectrum simultaneously, and the disc appears

Newton’s disc is a cardboard disc with different sectors colored red, orange, yellow, green, blue, indigo and violet. When turned quickly, the retina receives the sensation of the seven colors of the spectrum simultaneously, and the disc appears

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from: https://lucyfe.tumblr.com/post/10406462811