geometrical optical illusions (page 5)
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geometrical optical illusions (page 5) |
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 To have the answer about each illusion : put the cursor on the picture and wait : a text will appear. |
| © Ophtasurf, 2000-2006 |
Which is the longer distance? between A and B ? or between B and C ? |
Which is the longest line ? yellow or red one ? |
Is the stick clearer in top or bottom ? |
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What do you see ? A square ? |
Which point is in the center of the line ? |
Did the red line join the green one at its end ? |
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| Optical illusion of Kanizsa | ||||
What do you see ? A triangle ? |
Do the squares form a perfect checkerboard ? |
Are the squares bulged in the middle ? |
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| Optical illusion of Kanizsa |
| © Ophtasurf, 2000-2006 |
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