81.
Arrange the stages of the visual response to colour in order.
1. the signals travel through the optic pathway
2. light is absorbed by the three cone photopigments
3. the cortex constructs the colour percept
4. the cone signals are combined into opponent channels
Answer: A
Trichromacy occurs at the first stage and opponency at the second. Colorimetry models only the first and stops well short of the last. Trichromacy and opponency are successive stages. Colorimetry models only the earliest of them.
Please log in or register to report this question.