afterimages and conecell fatigue

[thalfor]

I was curious as to why the 3 color circle, in the afterimages project, uses 2 primary and 1 secondary colors (red, blue, and green) instead of all 3 primary colors (red, blue, and yellow)? Thank you

[MelissaB]

Hi,

The reason for this is that humans have three types of cone cells in their eyes, but they do not correspond to the three primary colors (red, blue, yellow). Take a look at this article on Wikipedia: http://en.wikipedia.org/wiki/Color_vision and see if it doesn't answer your question more thoroughly.

Good luck!