radio
Japanese Name:
ラジオ
Romaji Name:
rajio
Description
↓↓
A radio is a device that receives sound signals sent through the air as radio waves. It is used to listen to music, news, weather reports, talk shows, and other programs. Radios can be small and portable or built into cars and home sound systems.
History
↓↓
The development of radio technology began in the late 19th century. Key inventors like Guglielmo Marconi, an Italian physicist, are credited with creating the first practical wireless telegraph systems in the 1890s.
The word "radio" comes from the Latin word "radius," meaning "ray" or "beam," referring to the transmission of electromagnetic waves.
By the early 20th century, radio technology evolved to allow audio broadcasting, leading to the first public radio broadcasts in the 1920s. Radio quickly became a major medium for news, music, entertainment, and education worldwide.
In Japan, radio broadcasting began in 1925, and radio quickly gained popularity. Radios became household staples, especially before and after World War II, serving as important tools for communication and cultural exchange.