What phenomenon describes the change in hue perception associated with a given wavelength of light as light intensity increases?

The Bezold-Brucke Phenomenon is the principle that describes how the perception of color, specifically hue, changes as the intensity of light increases. This phenomenon illustrates that as the illumination level of a given wavelength increases, the perceived color can shift to a different hue. For instance, a certain wavelength associated with a specific color might appear more greenish at higher intensities and more yellowish at lower intensities. The underlying mechanism involves the way our visual system integrates color information from the cone photoreceptors in the retina, particularly under varying levels of brightness.

In contrast, the other options do not specifically address the relationship between hue perception and light intensity in this way. Brightness constancy refers to the perception that the brightness of a surface remains relatively constant, even in varying lighting conditions, without directly altering hue. The hue shift effect is not an established phenomenon in color theory, and the color contrast effect pertains to how colors interact with each other in a visual scene, affecting their perceived brightness and Hue, but not necessarily defining a direct change in hue due to intensity. Thus, the Bezold-Brucke Phenomenon aptly describes the change in hue perception associated with increasing light intensity.