That the perceived lightness of an object is explained by the ratio of light it reflects rather than the absolute amount of light it reflects, assuming even illumination across the visual scene, is known as the ______.
A)Gelb effect
B)lightness ratio
C)color-lightness invariance
D)ratio principle

Question

Quizplus · Accepted Answer

The ratio principle explains that the perceived lightness of an object is determined by the ratio of the amount of light it reflects compared to the amount of light reflected by its surroundings. This principle was first proposed by the Gestalt psychologist, Max Wertheimer, and is also known as the Weber-Fechner law of sensation.

That the Perceived Lightness of an Object Is Explained by the Ratio