What is radio?
What Does radio Mean
The term radio has a wide variety of uses. Originating in the Latin radius , the word is used in geometry to refer to the linear segment that joins the center of a circle with its circumference.
The radius, therefore, is half the diameter . In this case, the term is used in the singular and refers to the length of any of the radii of a circle or sphere. If it is said, for example, that a circle has a radius of 5 centimeters, this means that all the radii of said figure share the same extension (5 centimeters).
It is known as radius, on the other hand, the spoke of a wheel . It is about each of the bars that rigidly join the central area of the wheel with its edge, which is known as the perimeter region or simply the perimeter.
In the field of anatomy , the radius is a bone that, together with the ulna, forms the forearm. The radius is shorter than the ulna and, in addition, it is located below it.
Radio can also come from the scientific Latin radium and refer to the radioactive chemical element with atomic number 88 . In this case, it is a rare metal in the earth's crust that is used in the nuclear industry.
Radio, finally, is the colloquial term that makes it possible to refer to the radio receiver . This device is used to collect and transform the waves emitted by a radio transmitter into sound .
History of radio
Radio is a means of communication that has managed to stay current for decades despite the emergence of more sophisticated competitors, such as television and digital content in general. Interestingly, the name or nationality of the inventor is not known with certainty: potential creators include a Russian, an Italian and a Spaniard.
Regarding its operation, this revolutionary device could not exist if James Clerk Maxwell, a physicist originally from Scotland, had not formulated the theory about electromagnetic waves , since this event was followed by the discovery of radio waves, fifteen years later, by the German scientist Heinrich Hertz.
It was not until 1894 that Nikola Tesla, considered by many to be the true inventor of the radio, made a public demonstration of a radio broadcast . A year later, Guillermo Marconi presented an unprecedented radio system, with which he managed to cross the Atlantic Ocean at the beginning of the 20th century; It is worth mentioning that for his work he used patents that belonged to Tesla, which questioned his authorship on more than one occasion.
Radio as a means of communication and mass entertainment began to exist in 1920 in the United States and Argentina. As in the case of its invention, there are different opinions regarding the order in which the first stations appeared .
The first generation of radio was based on Amplitude Modulation (AM) technology, while in 1933 a system was proposed that relied on Frequency Modulation (FM), capable of producing higher sound quality and less vulnerable to the radio interference and interference. FM radio debuted in the late 1930s, although this did not spell the end for AM.
Finally, it is interesting to note that today it is possible to listen to radio through the Internet ; This entails two fundamental changes with respect to the use of a traditional device: practically any device capable of connecting to the Internet can be used, as long as it has (or allows the connection of) speakers; there is no need to physically pick up the signal, which is why all the world's stations can be tuned in from anywhere on the planet.