The 15 Best Optical Illusions That Will Blow Your Mind
Fraser’s spiral
This so called false optical
illusion is created by overlapping segments that appear to form
a spiral; however, the arcs are really a series of ordinary circles.
The Ebbinghaus illusion
This optical illusion of relative
size perception is named after German psychologist Hermann Ebbinghaus.
This illusion consists in misperceiving the size of circles. In this
version, as shown in the picture, two circles of identical size are
placed close to each other. One is surrounded by large circles while the
other is surrounded by small ones. The central circle on the right then
appears bigger than the left central circle.
Impossible Cube illusion
This impossible cube was invented
by Charles Cochran in 1966. The illusion of depth in this picture occurs
because of incorrect connections between the cube’s corners. Do not
even attempt to unravel the secret of this unrealistic figure.
Zöllner illusion
In the Zöllner optical illusion, the
parallel lines, crossed with a numerous oblique short lines, appear
to diverge. This effect was accidentally discovered on a cloth pattern
by German astrophysicist Johann Zöllner in 1860.
Jastrow illusion
This illusion was first demonstrated
by Joseph Jastrow, an American psychologist. It lies in the fact that
two figures that are absolutely identical appear to be different in size
when they are arranged in a certain way.
This triangle illusion is named
after the Italian psychologist Gaetano Kanizsa. To prove that people
experience reality not as it really is but as it is seen through special
filters called mental models, he drew a series of geometrical figures
giving an impression that there is a bright white triangle in the
center. However, this triangle doesn’t really exist at all.
Poggendorff Illusion
It’s a classic optical illusion
named after Johann Poggendorff, a German physicist. A scientist
discovered it in the picture received from F. Zöllner, a famous
astronomer. This illusion shows that in the example above, the black
line on the left appears to be a continuation of the blue line.
In actuality, the black and red lines match up. Interestingly, this
optical effect hasn’t been explained so far.
Blivet
Blivet, also known as impossible
trident, is a classic example of geometrical-optical illusions.
No matter how hard you try, you have no chance to understand this
figure — it simply doesn’t exist.
White’s illusion
At first glance, this illusion seems
contrary to common sense; the gray rectangles are exactly the same
color but they appear different because of the contrasting neighboring
colors — white and black.
Motion illusion
Certain color contrasts and shapes of the patterns depicted in the picture make you think that a static image is moving.
Hermann grid illusion
Ludimar Hermann discovered this
optical effect in 1870 while reading a book on sound by John Tyndall.
In the Hermann grid illusion, the "ghostlike" gray spots appear at the
intersections of white (or light colored) lines on a black background.
These spots disappear when one looks directly at an intersection.
An elderly couple, or songs to a guitar accompaniment
Just look at this loving elderly couple. And now take a closer look. What do you see this time?
Illusory rotating effect
Focus your eyes on a black dot
in the center, then, move your head slightly forward and backward.
If you look at the picture again, you will see the outer circles
rotating in the opposite directions.
The illusion of "The Wall Cafe"
Carefully look into the picture.
At first glance it seems that all the lines are curved, but in reality,
they are parallel. This optical effect was discovered by Richard Gregory
in the Wall cafe in Bristol, where it got its name.
Rotating wheels illusion
Take
a look at the picture. You are likely to see the wheels spinning
in different directions. But if you focus on any wheel individually,
it will stop turning, but the wheels around it will.
Preview photo credit Laura Williams Photography / facebook, www.laurawilliamsart.co.uk
Based on materials from The Telegraph
Based on materials from The Telegraph
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