Radio Broadcast
Radio broadcasting is a one-way sound broadcasting service, transmitted over radio waves (a form of electromagnetic radiation) from a transmitter to a receiving antenna and intended to reach a wide audience. Stations can be linked in radio networks to broadcast common programming, either in syndication or simulcast or both. Audio broadcasting also can be done via cable FM, local wire networks, satellite and the Internet. FM refers to frequency modulation, and occurs on VHF airwaves in the frequency range of 88 to 108 MHzJapan and Russia). Japan uses the 76 to 90 MHz band. Russia has two bands widely used by the Soviet Union, 65.9 to 74 MHz and 87.5 to 108 MHz worldwide standard. FM stations are much more popular since higher sound fidelity and stereo broadcasting became common in this format. everywhere. FM radio was invented by Edwin H. Armstrong in the 1930s for the specific purpose of overcoming the interference problem of AM radio, to which it is relatively immune. At the s...