# Light and Color - Mission LC7 Detailed Help

 A shirt appears green when illuminated with yellow light and blue when illuminated with magenta light. Identify the primary pigments that have been imparted to the shirt. List all that apply ... .   (Note: The actual colors are randomly selected and may differ from those above.)
 Color Subtraction and Primary Pigments: Primary pigments are painted onto or fixed within objects to subtract (absorb) one or more of the three primary colors of light. Any light color that shines on the paper and is not subtracted (absorbed) becomes reflected. This reflected light contributes to the color appearance of the object.
 Many students of physics have seen a diagram similar to the one shown at the right. The diagram depicts three circles colored with the primary colors of light - red, green and blue. The primary colored circles overlap to produce other colors of light, known as the secondary colors of light: cyan (C), magenta (M) and yellow (Y). These three colors - C, M, Y - are also the three primary colors of paint. The colors of light that they absorb are those directly opposite them on the color wheel. Cyan pigment absorbs red light. Magenta pigment absorbs green light. And yellow pigment absorbs blue light.
 The first sentence contains two parts. Each part describes how a shirt appears in the presence of a particular color of light. You will need to analyze each part carefully and thoughtfully. The thinking becomes complicated; don't rely on your memory - write down what you conclude from each analysis. Your thinking should proceed as follows: In each part of the first sentence, two primary colors of light shine on the paper; you will need to first determine which two light colors they are. (Use the color wheel in the Dig That Diagram section if necessary.) Only one of the two primary light colors is reflected; the other is absorbed. A primary pigment is in the shirt absorbing that light color. Use the Dig That Diagram section to determine which pigment that is. Write it down, take a deep breath and repeat the process for the second part of the first sentence.