Note on Radio

Radio is a form of wireless communication that uses electromagnetic waves to transmit sound through the air. It was invented in the late 19th century, with Guglielmo Marconi often credited for developing the first practical radio communication system.

Radio works by converting sound into electrical signals, which are then transmitted as radio waves. A receiver picks up these waves and converts them back into sound.

Radio has played a significant role in mass communication. It became popular in the early 20th century and was a major source of news, music, and entertainment before the rise of television and the internet. Even today, radio remains widely used around the world, especially for news, music broadcasts, emergency communication, and in rural areas where other media may not reach.

There are different types of radio broadcasting, such as:

• AM (Amplitude Modulation)

• FM (Frequency Modulation)

• Digital Radio and Internet Radio

Radio continues to evolve with technology, but its core advantage—delivering information and entertainment wirelessly to a wide audience—remains unchanged.