The Purkinje effect refers to the fact that
A) reds and yellows are brighter than blues and greens.
B) reds and yellows are more intense than blues and greens.
C) lights in the green-blue portion of the spectrum are brighter than lights in the yellow-red portion of the spectrum when viewed under dim illumination.
D) lights in the green-blue portion of the spectrum are brighter than equally intense lights in the yellow-red portion of the spectrum when viewed under dim illumination.
E) blue-greens are more intense than yellow-reds at night.
Question 2
The photopic spectral sensitivity curve of a person can be determined by having the person report the
A) intensity of various wavelengths of light shone on the fovea.
B) brightness of various wavelengths of light shone on the fovea.
C) intensity of various wavelengths of light shone on the periphery of the retina.
D) brightness of various intensities of light shone on the periphery of the retina.
E) both B and D
