Which of the following statements suggests that the trichromatic theory alone is insufficient in describing colour vision in humans?
A)
Other species, such as goldfish, pigeons, and ducks possess four types of retinal receptors.
B)
Light can be combined through both additive and subtractive colour mixing.
C)
The same colour can appear lighter or darker depending on the surrounding colours.
D)
Yellow light produces an intermediate response of long and medium wavelength receptors.
Answer: C