Now, look at the picture below.
How do you think about the darkness of color according to the tile A and the tile B?
Which is deeper?
Majority of people mentions that it's obviously the tile A. At first, I naturally thought so, too. However, the answer is no because their darkness of color is the same, unbeliebably. If you concentrate to see, you may finally get it.
Optical illusion causes when a human brain made a mistake while measuring of distance. When we look at an object, our brain resolves information such a shape, a color, etc. To recognize what the object in front of your eyes is, our cerebrum have to gather these reports. While organizing the information, the misinterpretation of the sensation happens, which is called optical illusion.
Then, please look at the next picture. It is a famous one, so I think many people have ever seen it. You know? You can see both OLD WOMAN and YOUND LADY in this picture, surprisingly.
Did you see? The Old Woman looking to the left with her chin to her chest and the Young Lady looking away from you over right shoulder are in the picture above. If you couldn't, you need to concentrate and think the necklace of young lady is the old woman's mouth or the ear of young lady is the old woman's eye.
There are more optical illusions.
1. Which line is longer?
Answer: They have the same length.
2. Are the horizontal lines below parallel?