Question: How does wi-fi work?

Laurence Perreault Levasseur answered on 17 Jun 2014:

Wi-fi uses radio waves, just like cell phones, radios and televisions. Radio waves are light wave with a very long wavelength, much longer than what we can see with our eyes.

Wi-fi works kind of like walkie-talkie, the router convert the information encoded in 0s and 1s into radio waves and broadcast them into the air. Then you computer receives those radio waves, decodes them and translates them back into 0s and 1s, which is the language that our computers can understand. The computer modem also does it opposite to transmit information about what you are doing to the router and then to the rest of the world!