According to the ratio principle
A) lightness constancy will occur as long as the ratio of light reflected from a white surface and a black surface remain constant.
B) lightness constancy will occur if the ratio of light reflected from a white surface and a black surface increases as the overall light intensity increases.
C) lightness constancy will occur if the ratio of light reflected from a white surface and a black surface decreases as the overall light intensity increases.
D) lightness constancy can never occur.

Question

According to the ratio principle
A) lightness constancy will occur as long as the ratio of light reflected from a white surface 	and a black surface remain constant.
B) lightness constancy will occur if the ratio of light reflected from a white surface 	and a black surface increases as the overall light intensity increases.
C) lightness constancy will occur if the ratio of light reflected from a white surface 	and a black surface decreases as the overall light intensity increases.
D) lightness constancy can never occur.

Quizplus · Accepted Answer

The ratio principle states that lightness constancy will occur as long as the ratio of light reflected from a white surface and a black surface remains constant. This means that even if the overall light intensity changes, as long as the ratio between the two surfaces stays the same, our perception of brightness or lightness will remain constant.

According to the Ratio Principle