Brief introduction of radio
In some ways, it can be said that the development of radio was made possible due to the other technological innovations that were taking place at that time. The invention of telephone and telegraph created many benefits for people around the world by allowing them to communicate easily with other people. On the other hand, the invention of radio lead to one step ahead where it concerned the growth and improvement of the radio because this technology was wireless in nature and the radio signals had the potential to travel through free space to reach to the desired destination. With the help of the “radio waves” which were discovered, people found that it was possible to not only conduct television broadcasts, talk through cordless phones, transfer music and speech through these signals but they can also transfer pictures and control toys through remote controls, some things that were considered impossible previously.
How does a radio work?
It is important for people to understand the functions of a radio as well so that they can know about the benefits that they receive through this device and the factors involved in it. The first stage is where the sound waves of any program are required to move into a microphone, which is present at a radio studio. This microphone has current in it that causes vibration to take place once the sound waves are able to pass through them. Before these signals are released with the help of a transmitter, they are to be checked by the technicians who are present over there so that they can control their volume. After this, they are sent through the air s electrical waves through antenna and these radio waves have the ability to travel in different directions once they are released in the air.
Features of the radio waves
Even though these radio waves cannot be seen by naked eye or could be heard through human ears, but if a person has a radio at their home or in their room, the signals could be detected and picked up by this device. Because a radio allows the person to select from the various stations that are available, they can select whichever channel they wish to tune into. A particular radio station is provided with a specific channel through the Federal Communications Commission. Hence, every station represents that particular channel.
Speed of the radio waves
It is possible for the person to listen to the radio waves as soon as they are released from the station. This is due to the fact that the speed of these waves is very high. They travel at the speed of around 186,282 miles per second, which means that once the signals are released, a person can listen to them within a fraction of a second. This is also one important feature of the radio as it enables person to know that they can use radio has a device which can convey their messages immediately without having to wait for it to transfer at a slow pace.