Optical Illusion Puzzles SNS COLLEGE OF ENGINEERING SKILL/CAREER DEVELOPMENT DEPARTMENT Optical Illusion Puzzles S. GOWSALYADEVI/AP MATHEMATICS/SCD SNSCE/SCD/OPTICAL ILLUSION PUZZLES 14/09/2018

1 Read what is written in the pyramid aloud. Do you find any mistake? Read it again if you don't. SNSCE/SCD/OPTICAL ILLUSION PUZZLES 14/09/2018

Which of the blue lines is longer than the other? 2 Which of the blue lines is longer than the other? SNSCE/SCD/OPTICAL ILLUSION PUZZLES 14/09/2018

3 Which of these orange circle is larger? 14/09/2018 SNSCE/SCD/OPTICAL ILLUSION PUZZLES 14/09/2018

4 Just try to move your eyes from one point to another to another in random motions. How many grey dots do you see? SNSCE/SCD/OPTICAL ILLUSION PUZZLES 14/09/2018

The red ball (dot) is inside the cube or it is outside it? 5 The red ball (dot) is inside the cube or it is outside it? SNSCE/SCD/OPTICAL ILLUSION PUZZLES 14/09/2018

6 Are the lines in the given figure bent or parallel to each other? How many of them are parallel if they are parallel and how many are bent? SNSCE/SCD/OPTICAL ILLUSION PUZZLES 14/09/2018

What extra would you be able to find in this picture ? 7 What extra would you be able to find in this picture ? SNSCE/SCD/OPTICAL ILLUSION PUZZLES 14/09/2018

8 Where is the book pointing towards? Is it towards you or away from you? SNSCE/SCD/OPTICAL ILLUSION PUZZLES 14/09/2018

Can you count the number of black dots in the picture? 9 Can you count the number of black dots in the picture? 14/09/2018 SNSCE/SCD/OPTICAL ILLUSION PUZZLES 14/09/2018

10 Hold back your head steady. Now just scroll the webpage up and down with moderate speed. What do you see? SNSCE/SCD/OPTICAL ILLUSION PUZZLES 14/09/2018

Answers SNSCE/SCD/OPTICAL ILLUSION PUZZLES 14/09/2018

1 Solution: You will find that when you read it aloud in a go, you will miss the fact that there are two 'The' written in between In and Hand. But you do will realize that if you look closely. The reason is that our brain fails to recognize the double word due to the placement of the words. This is the reason why the Pyramid shape was chose for the illusion. SNSCE/SCD/OPTICAL ILLUSION PUZZLES 14/09/2018

2 Solution: This illusion is also known as the Sander Parallelogram. You might feel that the left blue line is longer than the right one. Go ahead and measure them with a ruler. Surprised right? They both are of same length. However we perceive the left one longer due to the parallelogram figure. SNSCE/SCD/OPTICAL ILLUSION PUZZLES 14/09/2018

3 Solution: This illusion works on our size perception. You will be surprised to know that both the orange circles are exactly same in the sizes. But you might think that the right one is bigger right? Why? This is because we are perceiving the sizes in relation with the surrounding circles. Since the left ones are larger, we perceive that the inner orange circle is smaller than the right one. SNSCE/SCD/OPTICAL ILLUSION PUZZLES 14/09/2018

4 Solution: In reality, there are no grey dots in the picture. It is a black net over a white background. But our brain is processing information that is not real. This is because of the pattern itself. The white squares in between leads to the illusion of white dots which mixed with black color appears grey. SNSCE/SCD/OPTICAL ILLUSION PUZZLES 14/09/2018

5 Solution: It is in and out at the same time. Confused? It is just a matter of perception and the way you would want to look at this image. At the first look, you can find it in or out. But at the second glance, you may find the same or even the opposite. If you concentrate you can find it in and out both. The reason is the 2d image of cube that is drawn in perspective 3D. This is why you tend to see the red dot inside the cube however it is not literally possible as it is just a 2D image. SNSCE/SCD/OPTICAL ILLUSION PUZZLES 14/09/2018

6 Solution: This is one of the classic illusions that has now been taken up by many architects or designers and are used in many shops' or cafeterias' walls. The disorderly black and white squares are responsible for making us perceive that the lines are bent. However they are not. They are all parallel. If you want a proof, you can try measuring with a ruler. SNSCE/SCD/OPTICAL ILLUSION PUZZLES 14/09/2018

It is a bay face (see in the picture) 7 It is a bay face (see in the picture) SNSCE/SCD/OPTICAL ILLUSION PUZZLES 14/09/2018

8 Solution: This is a popular illusion. The angular placement of the two rectangles is the reason behind the illusion. It is just the matter of perception. You can perceive it as pointing towards you or even away from you. If you concentrate a bit, you can find both of the results. Take it as an exercise and try to perceive the both. SNSCE/SCD/OPTICAL ILLUSION PUZZLES 14/09/2018

9 Solution: It is true that your brain is producing the results that are not true. You will find that the black dots keep appearing and disappearing as you move your eyes through the image. However, there are no black dots. It is just a perception of our mind. SNSCE/SCD/OPTICAL ILLUSION PUZZLES 14/09/2018

10 Solution: If you scroll the page up and down, you will find out that there is a distinct square in the middle of the image. Now this square is moving. It is made possible due to the strange alignment of the red, orange and yellow stripe creating a perception in our mind that the square in the center is moving relatively to itself and not in a particular direction only. SNSCE/SCD/OPTICAL ILLUSION PUZZLES 14/09/2018