It's really interesting to see how our brain is hard wired to anticipate motion with the phi phenomenon. No matter how hard I tried, I could not stop seeing the second spiral as being the same speed as the first, even though I knew they should be. These kinds of optical illusions show how our brain is not like a camera but has quirks that may have helped humans survive in the wild in the past.
Azure
Looking back at this one, if I focus on the right circle of dots, it looks as if the left circle of dots is spinning clockwise, when in actuality, it's spinning counterclockwise.
It's really interesting to see how our brain is hard wired to anticipate motion with the phi phenomenon. No matter how hard I tried, I could not stop seeing the second spiral as being the same speed as the first, even though I knew they should be. These kinds of optical illusions show how our brain is not like a camera but has quirks that may have helped humans survive in the wild in the past.
Looking back at this one, if I focus on the right circle of dots, it looks as if the left circle of dots is spinning clockwise, when in actuality, it's spinning counterclockwise.