Radio waves are a type of electromagnetic radiation that transmit through free space by modulating electromagnetic waves with frequencies below light. They can range from 300GHz to 3kHz and travel at the speed of light. Radio waves are used for AM and FM radio, medical treatments like MRI, radio telescopes, mobile phones, wireless networks, radio and television broadcasting, and Wi-Fi networks. Mobile phones transmit to local cell sites to connect calls between cells as the phone moves. Television sends pictures via AM or FM and uses vestigial sideband modulation to reduce bandwidth for analog signals.

1. The use of radio waves and signals beyond radio broadcasting By Chadney Bigby

2. What are radio waves Radio waves are a type of electromagnetic radiation.

3. They transmit through free space by modulation of electromagnetic waves with frequencies below those of light.

4. The frequencies can range from 300GHz to as low as 3kHz.

5. They travel at the speed of light, naturally occurring radio waves are made by lightning.

6. Radio Waves The two most known radio waves are AM (Amplitude Modulation) and FM (Frequency Modulated.)

7. Depending on the information that is being sent AM works by varying the strength of the of the transmitted signal.

8. In telecommunications and signal processing FM varies its frequency to send information over a carrier wave.

9. Radio waves in medicine Radio waves have been used in medical treatments for many years.

10. It is normally used for minimally invasive surgeries like the treatment of sleep apnea.