How does "Wireless Charging" work?

How does "Wireless Charging" work?

Wireless charging concept is a game changer in the field of power supply. Even though the ones in the market seem to be very primitive,not offering much improvements compared to the traditional MHL wired counterparts, it serves as a valuable stepping stone higher and better improvements.
This draws us to the basic question, how do these things work?

I shall be explaining this in reference to the ones used in smartphones.

Basically the charging mechanism consists of two coils;
One equipped in the charger called Transmitter Coil, and
Another equipped inside the phone called Receiver Coil.

The charging coil consists of Alternating current which then induces a magnetic field. This then gets linked with the receiver coil producing an alternating current in the receiver coil. Thus voila!! your phone is charging.

So, which part was Wireless?
So,you heard the word Induces huh? !! ya that part is wireless. The process of induction is quite like those possession or exorcist kinda movies, you stare at a possessed  person and you too are going to get it!!.
Ya, just like that it a magnetic field produced by an varying current is also capable of simulating varying current.

So in the future if you see phones getting charged from one part of the room with the charger at the other, then it implies that, the magnetic field produced is stronger and is capable of producing alternating current in a coil at much larger distance. Thus it needs to have sophisticated charger. Hope we get our hands in one of those!!.