During a recent vacation trip to downtown Chicago, I saw a strange visual effect. There is a relatively new sculpture in the lakefront park, that is roughly kidney shaped. It is made from polished stainless steel and is highly reflective, and is large enough so you can walk through it.
If you look at your reflection while walking through it, your image is reversed. If you move your left arm, the reflected image you see has your arm moving on your right side. It is not the mirror image that you expect. Yet if you move "outside" of the sculpture, a mirror image is what you see.
Can anyone explain this unusual effect?
John Normile