NCIDQ IDFX Practice Exam

What occurs when all light colors are present in equal amounts?

1. Black light is perceived

2. A specific color is enhanced

3. White light is perceived

4. Additional colors are created

The correct answer is: White light is perceived

When all light colors are present in equal amounts, white light is perceived. This phenomenon is rooted in the additive color theory, which explains how different colors of light combine to create other colors. Specifically, the primary colors of light—red, green, and blue—can be combined in various ways. When these colors are mixed equally, they produce light that we recognize as white. This principle underlies many applications in lighting and displays, where the goal is often to create pure white light. For instance, in digital screens or RGB lighting systems, when all three primary colors of light are set to their maximum intensity, the result is white light. The perception of black light occurs when there is an absence of visible light, which is quite different from combining lights. Enhancing a specific color would imply manipulating the balance of colors rather than having all present evenly. Creating additional colors involves the mixing of light in various proportions, rather than having all colors in equal amounts, which would result in white rather than new colors.