In the past, people communicated with others who were too far away using wires. These wires have disadvantages as wiring all that cords all over the world is not the easiest of tasks. But that is the past. Now we communicate with people all over the world easily. It is a big surprise that we can’t see all those cords all over the world. That is because they are all over the world virtually rather than physically. So let’s get to the technology that allows us to make these wires “invisible”.
Radio is the technology that uses radio waves for wireless communication. Radio waves are electromagnetic waves with frequencies in between 30 Hz and 300 GHz. Radios work by transmitting and receiving electromagnetic frequencies with the range listed above. Firstly a transmitter radiates these electromagnetic waves using it’s antenna. Then a receiver picks up those waves and translates them into sound waves that we can hear via a speaker or a digital signal for other output sources. These other sources include televisions, satellite communication networks, etc.
In an 1864 presentation which was published in 1865, James clerk Maxwell proposed Theories about electromagnetism. In 1886-1888 Heinrich Rudolf Hertz proved the existence of Maxwell's electromagnetic wave with the help of a series of experiments using a frequency range that is now known as the radio spectrum. After some years, in 1894, Guglielmo Marconi started to work on the idea of building long distance wireless transmission systems. After some improvements, in 1895, Marconi was able to transmit signals for up to a distance of 3.2 km. This improved over the last century to something we now call radio. As an appreciation of inventors in this field, I conclude we use the invention wisely.
Ahmed Raeef Mohamed, known as Raeef is 15 years old. He has a fascination for books from a very young age. His favourite subjects are Mathematics and Science. He also likes to play football in his spare time. He is one of the selected few to attend the Leaders of Tomorrow program which is led by Professor Hassan Ugail.
Cite this article as:
Ahmed Raeef Mohamed, Radio Waves - Not in Sight but Everywhere, theCircle Composition, Volume 2, (2022). https://theCircleComposition.org/radio/