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Radio - Wikipedia


Radio is the technology of using radio waves to carry information, such as sound, .... An audio signal (top) may be carried by an AM or FM radio wave. Amplitude ...

AM vs FM - Difference and Comparison | Diffen


In FM, a radio wave known as the "carrier" or "carrier wave" is modulated in frequency by the signal that is to be transmitted. The amplitude and phase remain the ...

Broadcast Signals - HyperPhysics


Radio communication is typically in the form of AM radio or FM Radio ... frequencies which are produced by superposition of some signal upon the carrier wave.

Radio and digital radio | How it works | AM and FM compared


Nov 29, 2016 ... Artwork: How radio waves travel from a transmitter to a receiver. ... Frequency modulation is how FM radio is broadcast; amplitude modulation is ...

AM, FM Radio Waves and Sound - CyberCollege


May 28, 2013 ... Note in the tan area at the left of the illustration below that AM radio waves are of a lower frequency than either FM radio or TV waves. Thus, as ...

What is the difference between FM and AM radio? - Quora


AM and FM use different modulation techniques. AM modulates the carrier by changing the .... FM signals usually drop of at around 50 miles from the station, but AM waves can be refracted in the atmosphere resulting in greater range.

Radio Waves - NASA


Mar 27, 2007 ... Radio waves have the longest wavelengths in the electromagnetic spectrum. ... These waves are much smaller that TV and FM radio waves.

What's The Difference Between AM and FM Radio Waves ...


Sep 6, 2016 ... AM involves the alteration of the amplitude of the carrier wave, whereas FM involves changes in the frequency of the carrier wave.

What is the difference between AM and FM radio? | Reference.com


The basic difference between AM and FM radio is contained in their names; AM stands for amplitude ... The way in which radio waves are manipulated to...

Difference between AM and FM | AM vs FM Modulation


In radio communication, the message signal wave (low frequency) is ... In this article, we will discuss common difference between AM and FM which will ...

More Info

A Science Odyssey: Radio Transmission: FM vs AM - PBS


FM radio works the same way that AM radio works. The difference is in how the carrier wave is modulated, or altered. With AM radio, the amplitude, or overall ...

What Are Radio Waves? - Live Science


Apr 6, 2015 ... Radio waves are a type of electromagnetic radiation. ... HF, VHF and UHF bands include FM radio, broadcast television sound, public service ...

Understanding How AM/FM Radio Works - LifeWire


Oct 19, 2016 ... Ever wonder how AM/FM radio works? It's actually easy to understand once you know the basics. Learn how radio waves are created and ...