How does Wi-Fi transmit data wirelessly through the air?

Wi-Fi sends messages through the air using radio waves, just like how a walkie-talkie works.

Imagine you and your friend are playing a game where you send secret notes to each other without touching paper. You both have special flashlights that blink in patterns, fast blinks for "A", slow ones for "B", and so on. When your flashlight blinks, it sends a message through the air, and your friend’s flashlight reads it.

That's like how Wi-Fi works! Your phone or computer uses a kind of radio light (we call it radio waves) to send messages to the router, which is like the friend in the game. The router then sends those messages through the internet, just like your friend would pass your note along to someone else.

Your device, like a phone or tablet, has a special part called a Wi-Fi chip that makes radio waves vibrate really fast. These vibrations travel through the air and are picked up by the router’s Wi-Fi chip, which understands what the message is saying.

It's just like when you shout across the playground, and your friend hears you even though there’s no rope or phone between you!