How to connect to Wi-Fi
One interesting fact is that “Wi-Fi uses radio waves to allow electronic devices to exchange data or to connect to the internet.” Wi-Fi is sometimes not allowed in airplanes because the radio waves interfere with the way the airplane works because airplanes use radio waves to fly a little. If somebody uses Wi-Fi on an airplane, the plane could either crash or have the possibility to lose control and crash. (Wikipedia.com).
How to get Wi-Fi in your home
Next, you have to have a Wi-Fi router in order to connect your wireless device to Wi-Fi. The wireless router allows radio waves to get to your wireless device so that your device gets Wi-Fi. (Wikipedia.com).
Another important fact is that you should always make a password for your Wi-Fi. If you don’t make a password, someone could hack into your wireless device and steel all of your personal information.
The difference between Wi-Fi and 3G
Also, the difference between Wi-Fi and 3g is that 3g gets you internet access everywhere you go. Wi-Fi only gets you internet access at places with Wi-Fi routers. Usually, homes have Wi-Fi routers. If homes don't, the place can't get Wi-Fi.
Wi-Fi all day
Lastly, you should automatically have Wi-Fi when you get home. The Wi-Fi router stays on all day so that when you leave the house and return home, your device will be connected to Wi-Fi.
As you can see, Wi-Fi uses radio waves to connect to your wireless device, you should always make a password for your Wi-Fi or else someone could hack into your device.