Good Morning to all, it is Monday morning 10-13-14.

I will discuss today RESONANCE. Two objects are in resonance when one responds to the vibration of the other. One example is the guitar. The "box" is designed to resonate with the strings. A better example is demonstrating that one tuning fork banged will make a similar tuning fork vibrate nearby such as in a quiet gym. So far, we have discussed resonance of physical objects.

Radio waves at a certain frequency will be detected by a receiver in resonance with it. The transmitter has an oscillating coil and the receiver has a similar receiving coil. When these two coils are in resonance, the receiver reacts to the presence of the transmitter.

So, when you get a pair of similar coils and use one in a TX and another in  an RX, you can communicate using  radio waves.