In the video “Immaterials: Light Painting Wi-Fi,” a team of Norwegian researchers combined long-exposure photography with Wi-Fi signal detection to plot what happens to wireless signals when they intersect with common objects. To achieve the layering of electromagnetic terrain on top of everyday scenery, the three filmmakers constructed a 4-meter-tall Wi-Fi measuring rod. A Wi-Fi antenna was used to measure wireless reception at any given point, which was then displayed on the measuring rod using 80 different lights to indicate signal strength. Using a long-exposure camera, the researchers measured and displayed wireless signals while slowly moving the bar across a piece of terrain. Read more from PC Mag. See the video.
Light Painting Wi-Fi
