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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?
This method was covered in our guide to extend the WiFi range of your router, where you can also see a video on how to do it, as well as other great methods. The same method can be used with a metal bowl, and when you place your device in the bowl or near it, you should see a slight increase in you deviceâs WiFi signal.Other materials you can use to create your own antenna are aluminium foil or copper.he same method can be used with a metal bowl, and when you place your device in the bowl or near it, you should see a slight increase in you deviceâs WiFi signal. Other materials you can use to create your own antenna are aluminium foil or copper.