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HYPOTHESIS I hypothesize that all of the materials listed in the previous slide will decrease WiFi signal strengths, but the glass will have the least effect. Glass will have the least effect on the WiFi signal because it allows the low frequency light to pass through. I think that the metal door will have the greatest effect on the signal because it does not let as much light energy through. What materials reflect signals? What materials absorb signals?
Also, as Wi-Fi router is placed higher, like in a multi-story building, the Wi-Fi signal range increases to as much as 150 meters (492 ft.). However, as you move away from the source, the signal gets weaker. Also, obstacles may cause a Wi-Fi signal to weaken as well. Everything blocks Wi-Fi signals a little. Wood, plaster, cinder blocks, and glass don't interfere much, but brick, stone, and water (like a giant fish tank) can block a Wi-Fi signal more. The materials that really block Wi-Fi signals are ceramic, concrete, metal, and mirrors, which reflect visible light and radio waves alike (Wi-Fi Versus Your Walls. This means that since steel is a metal, it blocked Wi-Fi more than the duro rock.