This theory involves color perception and chemicals from the retina, and suggests that the color perception that we have is controlled by three systems that are opposed (the opponent system) with three different pair of colors: blue and yellow, red and green, white and black. After taking the test explained in the exercise the afterimage should have the opposite color of what you just stared at because of a phenomenon known as cone fatigue, giving us green.
<span>The nobles of the Renaissance differed from the
nobles of previous times because they belonged to royalty and were provided
with land in order for their will to protect the King. </span>
