The plates seems to appear upsidedown because the picture is a prime example of an optical illusion. An optical illusion is something that plays tricks on your vision. Optical illusions teach us how our eyes and brain work together to see. You live in a three-dimensional world, so your brain gets clues about depth, shading, lighting, and position to help you interpret what you see. Furthermore it involves visual deception due to the effects of colors,the impact of the light source & other variables,a wide range of misleading visual effects can be seen.
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