The wireless router in your living room may bring you the convenience of being connected online from anywhere and at any time but it comes at a cost.
German scientists have successfully used the radio frequencies emitted by a Wi-Fi transmitter to encode a three-dimensional object into a hologram. This achievement could mean that Wi-Fi signals leaking out of your living room may be captured by outsiders and used to reconstruct a 3D image of the inside of your living room.
The idea’s proof of concept has been achieved by Friedemann Reinhard and Philipp Holl from the Technical University of Munich (TUM), Germany. The results were published in the journal Physical Review Letters under the title “Holography of Wi-fi Radiation“.