Technology
How Does Wi-Fi Work?
Wi-Fi links devices to a router by radio on the 2.4, 5 and 6 GHz bands. See how the bands trade range for speed, what Wi-Fi 4 to 7 mean and how WPA3 works.
Technology
How the tools we use every day actually work, from satellites and networks to computers, software and the chips inside our phones.
Technology
How Do Touchscreens Work?
Resistive touchscreens sense two layers pressed together; capacitive ones sense a finger's effect on an electric field. How each works, and why gloves fail.
Technology
How Does GPS Work?
GPS works by timing radio signals from at least four satellites. A receiver turns each travel time into a distance, then into a position on Earth.