DNA and Moire
Walking to work, my eye was caught by a bright blue rectangle at the entrance to the parking garage in Rockville Town Center. Turned out to be an ad with dots forming the double helix of DNA. When I looked at the shot, saw the Moire effect you see in the photo. The link below takes you to an explanation, and a paragraph on how to avoid it when using a digital camera and photographing a TV screen.
Day 251 of my 365 Project