Cool Rainbow Optical Illusion
Focus on the dot of an image for few seconds then as long as you don't move your eye focus you will see a rainbow even though the image is only black and white.
A really neat trick to show your friends
A really neat trick to show your friends
This illusion is called Color Aftereffect and it actually exploits one of your eyes' weaknesses. The photoreceptors in your eyes will be excited by the first image and will combine the two images in your brain to recreate the original color image.
You can see a full technical explanation here.
You can see a full technical explanation here.
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