OPTICAL ILLUSIONS
1. It’s a simple one. How many pencils are there? There are clearly
seven… what, wait! Six? No.. So how many?
2. Close your left eye and stare at the cross. As the circle moves
left and right, it should pass through your
blind spot and disappear completely! You may need to lean in closer
to get this to work.
3. FADING STARS - Stare at the moon long enough, and the stars
should begin to fade away. How many can you get to disappear?
4. Can you tell which of these lines is longer? Test them with a
ruler or a piece of paper -- you may be surprised.
5. How many colors do you see? Most people see four colors: green,
blue and 2 shades of pink.
6. As the small circles intersect with the large ones, we seem to
see the outlines of a growing and shrinking square. But there is no "square" --
your brain is trying to visualize in terms of solid shapes, and fills in the
blanks.
7. We already had an entire post with such pictures that seem to be
in motion, but nope, they aren’t moving.
8. Look at the red dot for a while and gray stripes will
disappear
9. Although you don’t believe it, these lines are straight and
parallel
10. These two birds are identical, not only in size but in color
too.
11. These "fish" may appear to be wiggling, but the only thing
changing in this animation is the color.
12. What do you see here at first glance? The yellow arrows pointing
to the left or green arrows
pointing to the right? There is no correct answer. Different people
see different arrows at first (I saw the yellow ones)
13. Another "false spiral" -- actually a series of concentric
circles, hard as it may be to believe.
To prove that there's no spiral, try tracing your finger around one
of the circles. You'll see that it never moves
inward or outward.
14. Do you see the rose spots? Well, if you look at the cross, soon
enough there’ll only be one green
spot running around, other spots will disappear.
15. First, look at the image at a close distance, then look at it
from 1 meter distance
16. Hover you mouse cursor over the picture. Does it
move?
17. Which direction is the cat rotating: clockwise or anticlockwise?
Once again, different
people will see different direction. I see it rotating in a
clockwise direction. With practice,
you can make it switch at will!
18. These spirals are spinning only in your head ;)
19. Three illusions in one! This three-in-one illusion includes a
false spiral, an impossible
Escher-esque structure, and what appears to be a seriously warped
floor...
20. The word is hidden here.
Can you spot it?
21. Can you tell where on this curve the
lines are the longest, and where they are the shortest?
22. Are the walls of this house
facing outward, or inward?
23. Which of these two dots is
in the true center of the circle?
24. Can you tell which of these
cars is the largest?
25. Here's a simple one. Are
these two rows of squares perfectly parallel?
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