afterimages flag complementary

Keep your eyes on the photo for 10 seconds, then click it.

Did you see the black and white photo of the flag turn colorful for a moment when you clicked on it? This is an illusion that uses a phenomenon called afterimages. Afterimages happen when you stare at a color for a while and then look away. The complementary color will appear as a ghost image.

Afterimages Flag

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OpticalIllusionsQ