How does the wireless Internet work on laptops?

In simple terms, you have two hardware devices that make up wireless connections. First, you have a Wireless Access Point or AP or WAP. A wireless access point is simply a wireless hub. An AP has antennas for sending and receiving the wireless signal to other wireless devices and it also has a cat 5 connection for connecting to the network.
The other device is a Wireless NIC. Wireless NIC's are manufactured for both desktop and laptop applications, however, the laptop NIC's are more popular. The wireless NIC's have a built-in antenna and it is also sends and receives signals. 802.11b/g devices send and receive at 2.4GHz.

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Absolutely fantastic! A friend of mine would bring over his laptop & while I sat with my desktops poorly performing internet connection, he'd be connected through a anonymous IP that was lucky to have been useful in getting his Apple Mac online & with great download speeds. Lucky, considering that they somehow had their radiation permeating into the inner spaces of my home.

In fact, I should investigate whether or not the dangerous, brain zapping, wireless radiation is still violating the spaces of my inner sanctum. Imagine that, it's their produced & marketed product, yet my private property is infiltrated by it without any benefit produced other than the billions they rake in while emanating their intrusively trespassing, dangerous radiation

Honestly, I am going to wrap some tin foil around my head and pray the aliens don't get me.