Excel Optical Illusions #3

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This one's pretty easy. Can you figure out how the Excel chart for this week's optical illusion was created?


When you stare at any white dot you can clearly see that it's just a white dot, and nothing more. But all around, the other white dots have illusionary black dots within them!

I'll have another Excel Optical Illusion next Friday.

Here's the chart:

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This page contains a single entry by Daniel Ferry published on March 5, 2010 1:01 PM.

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