#K12ArtChallenge PERCEPTION: Optical Illusions
This week we will observe optical Illusions. They are all around us, we experience them all the time without even being aware of it. A simple example are Mach Bands. Looking at the strips of different values of gray, it appears that there is a gradient within each strip. However the strips are completely flat. It is worth noting that this wasn't discovered until the late 1800s!