It’s an Il-LU-sion!
I started off thinking that I was going to blog about color and light, and how, without light, there is no true “color.” But the more I thought about it and read about it, the more my stream of consciousness took me into some murky backwaters. The thought of trying to explain what I was thinking, and the implications of it all was almost existential. For goodness sake! I don’t want to write that heavy stuff on a Thursday night when the Golden Girls are on, and I’m SURE you don’t want to read it!
But while I was reading about color theory, I came across a couple of neat optical illusions (and thus the throwback to the creepy Doug “It’s an Il-LU-sion” Henning from the 70s).
The first illusion is pretty straightforward and simple, but interesting nonetheless. See the caption for what makes it interesting.
The second one is really cool. I will explain it here, rather than in the caption.
(Well, the animation would not work when I published this. You can go here to see the effect, but you can read what to expect below. Sorry about that!)
There are twelve purple dots, and a every 1/10 of a second or so, a purple dot is replaced with a lilac dot in sequence clockwise around the circle.
If you stare at the cross in the middle of the circle for about 20 seconds, your peripheral vision will see this:
First, the lilac dot will become a gap, moving around the circle.
Then, the gap will appear as a green dot. (This happened quickly for me. I didn’t see the gap but for a second.)
Finally, the dots will disappear as if it’s “Pac Man” eating them up!
How cool is that!