Which of the following is a disadvantage of the trichromatic theory of color vision?

• A. It accounts for color blindness in all cases.
• B. It cannot fully explain the phenomenon of afterimages.
• C. It describes how colors are processed in the brain's visual cortex.
• D. It explains the perception of all colors using only two types of cones.

Answer: (B)

Verified step by step guidance

1. Understand the trichromatic theory of color vision, which proposes that the retina contains three types of cones sensitive to red, green, and blue light.
2. Recognize that this theory explains how the eye detects colors by combining the activity of these three cone types to perceive a wide range of colors.
3. Identify the limitations of the trichromatic theory, such as its inability to explain certain visual phenomena like afterimages, where complementary colors appear after staring at an image.
4. Compare the trichromatic theory with other theories, such as the opponent-process theory, which better accounts for afterimages and color perception beyond the retina.
5. Conclude that the disadvantage of the trichromatic theory is that it cannot fully explain the phenomenon of afterimages, which is why this is the correct answer.