Certified Technology Specialist (CTS) Practice Exam

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Which color system is used to display colors from a video display?

Additive color system
Subtractive color system
CMYK color model
Gray scale color system

The correct answer is: Additive color system

The additive color system is the correct choice for displaying colors on a video display. This system works by combining different wavelengths of light to create a wider spectrum of colors. In the context of video displays, the primary colors are red, green, and blue (RGB). When these colors are added together in various intensities, they produce a variety of colors that the human eye can perceive. For example, when red and green light are combined in equal intensity, they create yellow. If all three colors (red, green, and blue) are combined at full intensity, the result is white light. This method stands in contrast to subtractive color models, like CMYK, which are based on the absorption of light and typically used in color printing. Video displays rely on the additive process because they emit light rather than reflecting it, which is why this system is fundamental in digital screens, such as televisions and computer monitors.