Optical Illusions I
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Transcript of Optical Illusions I
- 1. Optical Illusions II
2. Can you unweave this web and find the hidden word within it? 3. ANSWER: A little color-coding helps to reveal the truth. 4. Stare at the red dot long enough, and the grey stripes will disappear. 5. Believe it or not, these lines are straight and parallel. 6. Another "false spiral" -- actually a series of concentric circles, hard as it may beto believe. To prove that theres no spiral, try tracing your finger around one ofthe circles. Youll see that it never moves inward or outward. 7. Whats your first impression of this image? Yellow arrows pointing left, or green arrowspointing right? There is no "correct" answer, but different people perceive this imagedifferently at first. 8. Try moving your mouse pointer down across this image, following the pointer closelywith your eyes. You should see a rippling effect moving through the picture -- eventhough its a completely static image! 9. Believe it or not, this image is not animated. The effect persists only inyour peripheral vision; if you focus on any one of the spirals, it will stopmoving. 10. This three-in-one illusion includes a false spiral, an impossible Escher-esque structure, and what appears to be a seriously warped floor... 11. With the black and white squares removedfrom the tiles, we see that the lines on thefloor are perfectly straight. 12. Can you tell where on this curve the lines are the longest, and where they arethe shortest? 13. ANSWER: They are all the same length. 14. Are the walls of this house facing outward, or inward? 15. ANSWER: Depends on how you look at it. If you isolate the top portion ofthe image, the house appears to be concave, facing inward. Isolate thebottom, and the perspective is reversed. 16. Which of these two dots is in the true center of the circle? 17. ANSWER: With the distracting lines out of theway, its apparent that the green dot is at thecenter. 18. Which square is a lighter shade, A or B? 19. ANSWER: Taken out of context, you can see Aand B are the same shade. Our familiaritywith light and shadow tricks us into thinking Bis "actually" lighter than A. 20. Heres a simple one. Are these two rows of squares perfectly parallel? 21. ANSWER: They are indeed perfectlyparallel, which becomes more apparent whenthe line between them is highlighted.