Question

As the intensity increases, hue perception changes. The effect is called:

• A. Metamerism
• B. Bezold-Brucke effect
• C. Chameleon effect
• D. Tyndall effect

Hint:

The Bezold-Brucke effect explains how the perception of color can change under varying light intensities due to the response of retinal cones.

Answer 1

The Correct Option is B

The effect of changes in hue perception with changes in light intensity is called the Bezold-Brucke effect. This effect was first described by two German physiologists, Wilhelm van Bezold and Karl Brucke, in the late 19th century. The Bezold-Brucke effect refers to the phenomenon in which the hue of a color appears to shift as the intensity of the light illuminating the color changes. 
For example, a red object viewed under low light levels may appear to be more brown or dark gray, while the same object viewed under bright light may appear to be a brighter, more vivid red. Similarly, a yellow object viewed under low light levels may appear more greenish, while the same object viewed under bright light may appear more pure yellow. 
The Bezold-Brucke effect is caused by changes in the sensitivity of the cone cells in the retina of the eye at different light levels. Different types of cones are more or less sensitive to different parts of the visible light spectrum, and changes in light intensity can affect the relative activation of these different types of cones, resulting in changes in hue perception. 
Metamerism, chameleon effect, and Tyndall effect are other phenomena related to light and color perception, but they do not explain the change in hue with light intensity.