Modulation of AM and FM radio - JavaLab

# Modulation of AM and FM radio

* Above simulation adjusted the amplitude and wavelength for easy observation.
* For your understanding, the frequency modulation range of FM broadcasts is exaggerated.

The audible frequency is commonly referred to as 'sound.' Sound's frequency range is about 20 Hz to 20 kHz.
There are some restrictions to transmit and receive electromagnetic waves of this audible frequency directly. The size of the antenna must be huge. And We cannot send it far.
In general, electromagnetic waves for broadcast have a much higher frequency.
Frequently used AM and FM radio frequency bands are as follows.