A piece of paper looks white in both the noonday sun and under moonlight, even though there is less light being reflected off the paper under moonlight. This form of perceptual constancy is called __________ constancy.
A) size
B) shape
C) brightness
D) color

Question

Quizplus · Accepted Answer

Brightness constancy refers to the ability of our eyes and brain to perceive an object as having a constant color and level of brightness even as lighting conditions change. This is why a piece of white paper appears to have the same level of brightness in both the noonday sun and under moonlight, even though the amount of light reflecting off the paper is significantly less under moonlight.

A Piece of Paper Looks White in Both the Noonday