Sliding Gray Step Online Exhibit - Tech Learning

Sliding Gray Step Online Exhibit

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This online exhibit allows you to move two blocks of gray stripes into areas of white and black stripes. The gray stripes, which are all exactly the same shade of gray, can be made to appear lighter or darker by changing their position relative to the white and black stripes. This exhibit offers a possible explanation for the optical illusion, explaining how light-sensitive nerves in the retina process information that the brain interprets as areas of light and dark.

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