system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How does information pass through the air? (ie, Wifi, television, phone calls, etc.) How did someone learn to do that? What? Science and technology literally blow my mind.
gpt
Wireless communication usually uses radio waves, which are a form of electromagnetic radiation just like visible light is. While visible light is blocked by most solid materials, radio waves can pass through most substances to some extent, which is why you can use a cell phone from inside your house (but probably not in a tunnel underground).

The radio waves are created by passing an electric current through an antenna. When the radio waves hit another antenna, they then create another electric current. The electric current used to make the radio waves is varied to send specific signals, and the electric current on the other end is measured to decode those signals.