The difference threshold for light is defined as the

Question

Quizplus · Accepted Answer

The difference threshold, also known as the just noticeable difference (JND), is the smallest difference in intensity required to perceive a difference in intensity 50% of the time. This is the correct definition for the difference threshold for light. A is incorrect because it refers to the absolute threshold, which is the minimum amount of light needed to see a stimulus. B is incorrect because it does not relate to the difference threshold for light, which is concerned with differences in intensity, not wavelength or amplitude. C is incorrect because it refers to analogous hues, which are not related to the difference threshold for light.

The Difference Threshold for Light Is Defined as the