What is the radio frequency?

The radio frequency indicates an alternating electric current with certain properties that allow transmission from the antenna. If the current generates an electromagnetic field or waves at a frequency that is suitable for broadcasting television or radio signals, then it is considered to be a radiofrequency. These frequencies are part of the electromagnetic spectrum and are located just behind the infrared side of the visible light.

Any frequency between approximately nine hertz - which means nine cycles per second - and 300 Gigahertz - which means 300 billion cycles per second - can be considered a radio wave, although only frequencies near this extent are used in actual radio broadcasting. The rest of the range of radio frequencies uses military and scientific staff, mostly. TV broadcasts received through the air are a form of radio wool, as well as satellite communication, civic band and wireless and cellular phones. In fact, every available wireless technology uses its own radio frequencyence.

Most radios and wireless devices serve a single purpose, such as accepting AM radio or carrying sound and images for a short distance at one radio frequency, as is the case with the child's monitor. However, there are also radio receivers that have access to a very wide range of frequencies, and these are known as scanners. Many people use scanners to tune in radio frequencies used by police and fire brigades or air traffic administrators. The scanners can only be tuned to one station or set the waves in the activity area and stop when transmission is detected.

One of the less known uses of radio frequencies is the visual tool in astronomy. Objects in space often emit a large amount of energy other than visible light, such as X -rays and radio waves. In fact some static we hear between stations when otWe are the radio dial, especially at night in abandoned areas, are actually from interstellar radio waves. Although these radio waves are very weak at the time they arrive on the ground, astronomers can use them to create a more complete image of Kosmos than to see only with the eye, even with a telescope.