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Ward's World+McGraw Hill - Color

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Color (continued) + ward ' s science 5100 West Henrietta Road • PO Box 92912 • Rochester, New York 14692-9012 • p: 800 962-2660 • wardsci.com Fig. 6: Illustration of variations in hue (left panel), saturation (middle panel), and lightness (right panel). The hue, saturation, and lightness vary with vertical position, starting from the same color at the top of each patch. The hue changes from short wavelength to long wave- length (high frequency to low frequency) in going from top to bottom in the left panel. The saturation changes from high to low in going from top to bottom in the middle panel. The lightness goes from high to low in going from top to bottom in the right panel. (Credit: Thomas Weinacht) Fig. 7: Light of multiple colors incident on a red apple with a green leaf. The leaf reflects mostly green light, while the apple reflects mostly red light, leading to the appearance of a red apple with a green leaf. (Credit: (apple) Alex Staroseltsev/Shutterstock, (rest of figure) Thomas Weinacht) Fig. 8: Additive (left) and subtractive (right) color mixing. The left side shows the result of additive color mixing of red (R), green (G), and blue (B). The right side shows the result of subtractive color mixing with magenta (M), yellow (Y), and cyan (C). (Credit: Thomas Weinacht) Fig. 5: Illustration of hue, saturation, and brightness for light containing multiple wavelengths. (Credit: Thomas Weinacht) the blue wavelength portion, and magenta by subtract- ing the green wavelength portion. Accordingly, mixing magenta and cyan paint produces blue because magenta has the green wavelength portion removed and cyan has the red portion removed, leaving only the blue portion. The mixing of additive and subtractive colors is illustrated in Fig. 8. Note that mixing all three additive colors produces white because one has added the three primary colors that stimulate all three receptors in the eye the same way that white light would. In contrast, mixing the three subtractive primary colors leads to black because one has subtracted out each of the colors that stimulate the three receptors in the eye. This article was originally published by McGraw Hill's AccessScience. Click here to view and find more articles like this.

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