Excerpt from A Class-Book of Color: Including Color Definitions, Color Scaling, and the Harmony of Colors
Prismatic White light, that is, sunlight, is composed of various colors. Colors, as is easily shown by placing a prism in the path of a small beam of sunlight. The prism separates the different colors that compose white light, and produces what is known as the prismatic or solar spectrum, as shown in the illustration.
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