There are many scientific explanations for optical illusions, and there are basically two types of visual illusions in themselves: physical and cognitive. While physical illusions depend on environmental and physical factors such as light, location, distance, cognitive illusions may vary a little more depending on the individual’s intellectual inferences or character traits.
There are also illusions that are still being investigated and unresolved how it looks like this. It is a subject that is always on the radar of the scientific world. We’ve compiled optical illusions for you that are fun to review and ponder over how they look!
Impossible Trident (Impossible Trident)
The impossible fork, also called the blivet, poiuyt, or demon tuning fork, is an undecipherable optical illusion originally called the impossible trident. It appears to have three cylindrical prongs at one end, but mysteriously transforms into two rectangular prongs at the other end.
In 1964, a man named DH Schuster announced that he had noticed a new type of vague figure in an aerospace magazine advertisement, calling it the ‘three-bar fork’. He described the illusion as: “Unlike other obscure drawings, it’s a real shift in visual fixation. ”’
Bezold Effect
The Bezold Effect is an optical illusion named after German meteorology professor Wilhelm von Bezold, who discovered that a color can look different depending on its relationship to adjacent colors. As can be seen in the Bezol effect image above, red looks lighter with white but darker with black.
Cafe Wall Illusion
The cafe wall illusion is an optical illusion first described by Doctor Richard Gregory. Observed on the wall of a cafe in Bristol, this intriguing optical illusion makes parallel straight horizontal lines appear bent when in fact they are not. To create the illusion, light and dark tiles are laid in staggered rows, thus creating a distorted image.
Chubb Illusion
The Chubb illusion is created when the size of an object changes according to the viewer, depending on its contrast with the area in which it is viewed. This optical illusion is of particular interest to researchers as it is thought to provide valuable information regarding human visual systems.
In the example in the image above, the centers of the two rectangular areas are actually the same, but because the backgrounds are different, the centers appear to be different for the two sides.
Ebbinghaus Illusion
It is an optical illusion based on the relativity of size perception, named after its discoverer, German psychologist Hermann Ebbinghaus. In the most familiar version of the illusion, circles are placed around two circles of the same size, one large and one small. However, the center with large circles around it appears larger than the other.
Fraser Spiral Illusion
The Fraser spiral illusion, first described by the British psychologist Sir James Fraser, is also called the false spiral or twisted cord illusion. In the illusion that looks like a spiral as a result of the overlapping of the black arc parts, all the arcs are actually concentric circles. The reason for the visual illusion is that there are misaligned pieces in the background of the circles.
Hermann Grid Illusion
First described incidentally by Ludimar Hermann, the grid illusion emerged when gray spots were detected at the intersections of a white grid on a black background.
Jastrow Illusion
In this optical illusion, which was first discovered by the American psychologist Joseph Jastrow and named differently, such as Jastrow, Ring-Segment, Wundt, two objects of equal length and exactly the same, like a train spring, appear shorter than the top when placed on top of each other. Although there are various theories as to why our brain plays such a game, no definite reason has been explained.
Checkers Shadow Illusion
In the checker shadow illusion, it is thought that the colors of the two squares, A and B, are different, through the shadow created by a cylindrical structure on a checkerboard. However, the two squares are exactly the same color.
In order to verify the illusion, we can observe two squares that we think are of different colors by combining them with the help of a strip of the same color.
Poggendorff Illusion
The Poggendorff illusion is an optical illusion that involves the brain’s perception of the interaction between the diagonal lines and the horizontal and vertical edges. It is named after the German physicist Johann Poggendorff, who first described it.
As seen in the image above, a solid black and red line is hidden by a gray rectangle. But in the illusion, instead of the red line, it seems as if the blue line is connecting to the black.
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