Importance of Listening Radio

Radio waves were first recognized by German physicist Heinrich Hertz in 1886. The first hands-on radio transmitters were developed about 1895-6 by Italian Guglielmo Marconi, and radio inaugurated to be recycled commercially around 1900.


What was the radio first used for?

In the 1920s, radio was first used to conduct pictures visible as television. 

In early 1930s, Sngle Sideband (SSB) and frequency modulation (FM) existed invented by inexpert radio operators. By 1940, they were well-known commercial modes.

What are the types of Radio?

1: One way Radio: It is very simple radio. It receives communications form the control center. Example: Race tracks.


One Way Radio

                            

2: Two way Radio: It transmit and receives the signals simultaneously.


Two Way Radio


3: Fixed Mount Radio:  It is an unusual device with a receiver and an internal multi-channel antenna.


Fixed Mount Radio



4: Portable Radio:  This radio can be easily installed and move from one place to another.


Portable Radio


5: Pocket Radio: It is very useful in emergency Situations. It can notify weather & transmit signals form the shortwave stations.
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Why does radio still exist?

Unlike television, satellite broadcasting, or most forms of streaming, radio is shaped and spent locally, with local news and local advertisers. Even though print media is on the verge of demise in many areas, Radio still remains strong for informing you on what is going on in your area.


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