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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?
So visible light travels through glass, but not thick wood. Radio waves are long and pass through buildings because of this. Also, gamma rays are short and therefore very high energy which is another way to pass though materials. Interestingly, very long radio waves drag in the earth and water, slowing down and will hug the Earth...