If you really want to mix yourself up, it would be right side up if your brain wasn't already flipping the image. The lens of your eye inverts images as well. When the image strikes your retina, it is upside down and your brain goes through the trouble of turning it right side up.
Lenses and mirrors work in opposite ways, though. Mirrors bounce light, and lenses bend them. The concave spoon is a mirror and bounces the light in. After the point where the beams cross, they are opposite. There is an exhibit in the Corning Glass Museum where you can walk up to a giant mirror, passing through the focus point. It'll give you a headache in a hurry. At the starting point, you see yourself upside down, and by the time you get up to the mirror you're right-side up again.
Response last updated by gtho4 on Oct 08 2016.
Jan 23 2005, 5:07 PM