A student sent me this email and I don't have a response. Can somebody help me?
When you did the negative color afterimage demonstration in class on Tuesday, I looked at the cross in the middle of the four eagles. The blue and yellow swapped like I thought they would, but red became cyan and green became magenta. They went to their color opposite instead of the "red green" opposite we were taught. I also did a negative afterimage with this image http://2.bp.blogspot.com/-bQvF9kxioDc/T-m6569bd6I/AAAAAAAADP4/9yl0NLP1G5Q/s400/red-green-blue-light-make-white.png Red, green, and blue turned into cyan, magenta, and yellow respectively (on a white piece of paper) but the green was much stronger than the red, which was stronger than blue. Is there a reason why some of these afterimages show up more strongly? Lastly, by focusing on the boundaries of the images I can imagine that there are only three circles, each with its own filter. When I do this, I can no longer see the cyan, magenta, yellow, or white parts of the image and this is easier to do when my eye is unfocused. Do you know the cognitive explanation for this? Thanks, Carla Grayson ([email protected]) University of Michigan --- You are currently subscribed to tips as: [email protected]. To unsubscribe click here: http://fsulist.frostburg.edu/u?id=13090.68da6e6e5325aa33287ff385b70df5d5&n=T&l=tips&o=39798 or send a blank email to leave-39798-13090.68da6e6e5325aa33287ff385b70df...@fsulist.frostburg.edu
