Very well said, @msasterick. If only I could directly like your comment or something. Thank you for giving a good explaination.
In real life, there is an actual yellow wavelength independent of the green and red wavelengths. Computers simply ignore all wavelengths EXCEPT red, green, and blue. This is because theoretically, any color can be imitated with RGB. A picture of a lemon on a computer is red and green. On paper, it is magenta and yellow (ink uses color subtraction, in which red + green = brownish). But in real life, a lemon is truly yellow.
I can see one pixel without zooming, weird. But i can only do that with red pixels, the green pixel is just hard to see without zooming.
@Cocoduf If you mix red and green IRL it makes brown. This is a demonstration of the RGB color system. Also, stop typing like an annoying 12 year old girl.
Cocoduf, learn that the yellow on the screen is red and green tricking your eyes.