Two Gray Squares That Have the Same Luminance Value May

Multiple Choice

Two gray squares that have the same luminance value may appear to be different in a scene. This effect is due to the fact that

A) photoreceptors do not carry information about luminance.
B) photoreceptors only carry information about contrast.
C) retinal Ganglion Cells and geniculate cells respond to local contrast, not luminance.
D) retinal Ganglion Cells and Geniculate cells respond to luminance, not contrast.
E) visual cortical cells do not respond to light.