When wireless signals leave a WiFi hotspot and travel to a computer or other wireless device, the wifi signal strength decays as it passes through air or solid objects. This is why a computer may be unable to pick up the signal from a hotspot that is more than a couple of rooms away. The amount that the wifi signal falls off depends on the medium it passes thorough; for example, whether it passes through a wall, door or window.This project requires measures wifi signal strength as it passes through air and solid objects.The goal is to have the student collect an analyze experimental data in order to reach an understanding of how wifi signal strength is affected by various . The experiment requires wireless access to the Internet (a WiFi hotspot). Ideally the student will own or be able to borrow a wireless device (e.g., personal computer, video game console, smartphone, or digital audio player) that displays WiFi signal strength. If this is not the case, a standalone wireless detector may be purchased. Wireless devices that connect to the Internet and WiFi hotspots are present in many homes. WiFi hotspots are accessible in many homes as well as business establishments outside the home. Inexpensive WiFi detectors can be purchased on the Internet.

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