Radio Waves

In radio modern society, radio is the most widely used medium for broadcasting and electronic communication. It plays an important role in many fields such as public safety, industrial manufacturing, processing, agriculture, transportation, entertainment, defense, space travel and so on. Overseas newsletter, news report, weather forecast. In radio broadcasts, the radio waves they use are either microwaves or longer waves. They are transmitted in two ways: amplitude modulation (AM) and frequency modulation (FM).

The wavelength of radio waves is about 103 meters. As its name suggests, radio waves are transmitted via radio, TV, and even mobile phones. Radio energy level is lowest. Radio waves are used for remote sensing, where the hydrogen in the universe radiates radio energy at low frequencies and is collected as radio waves. They are also used in radar systems that emit radio energy and collect bounce energy. Particularly suitable radar systems for meteorology are used to predict weather patterns by mapping the surface of the earth as radio energy can easily break through the atmosphere. ;

https://chem.libretexts.org/Textbook_Maps/Physical_and_Theoretical_Chemistry_Textbook_Maps / Supplemental_Modules_ (Physical_and_Theoretical_Chemistry) / Spectroscopy / Fundamentals_of_Spectroscopy / Electroagnetic_Radiation

Radio waves are electromagnetic waves, microwaves, infrared rays, X-rays, gamma rays. The most famous radio waves are used for communication; televisions, mobile phones, and radios all receive radio waves and convert them into mechanical vibrations with speakers to produce audible sound waves. Electromagnetic radiation is transmitted by waves or particles of different wavelengths and frequencies. This wide range of wavelengths is called electromagnetic (EM) spectroscopy. Spectra are usually divided into seven areas in order of decreasing wavelength and increasing energy and frequency. Common names are radio waves, microwaves, infrared (IR), visible light, ultraviolet (UV), X-rays, gamma rays.