Entries with tag "optics"

As I bent over the sink in the bathroom to wash my hands, I noticed that I could see my head reflected twice in the metal of the faucet: once normally, and another one upside down, the two reflected heads nearly touching at their tops. I thought, "What an odd optical property. I guess the curve of the faucet causes there to be one focal point where the reflected image shifts upside down." I tried moving my head forward to see what happened to the image when I crossed that point. Suddenly my head bumped into the mirror on the wall. Oh, yeah.