You know RFID tags? Making it easier: You know those cards that can be read by only getting it closer to reading terminals (even though not all of them uses RFID technology)?
They have invisible fields we are always interacting with, but have never seen… up ’till now:
http://www.vimeo.com/7022707
Jack Schulze and Timo Arnall from the Oslo School of Architecture and Design used long exposure photography and a special LED wand that lights up when getting in contact with that field to demonstrate it’s shape.
Very interesting stuff!

Source: Gizmodo