Xavier and Rex each own a television. They watched the exact same programme at the exact same time. However, what looked like white on Xavier’s television looked yellow on Rex’s. In this case, what colour would cyan, on Xavier’s, look like on Rex’s, and why?
Answer
Cyan would look like green. This is because pixels are made up of a red light, a green light and a blue light. All three of these colours are required to make white. The blue lights in Rex’s television don’t work, so the red light mixed with the green light, without the blue light, makes yellow. Similarly, you need blue and green to make cyan. Since there is no blue, what would be cyan looks green.