RADIO
Radio is a technology that utilizes signal transmission and modulation by electromagnetic radiation (electromagnetic waves). Radio invented by Guglielmo Marconi (1874-1937). He started to make the radio in 1984 after he was inspired by the results of Hertz Heinritch’s experiments in electromagnetic waves.
At first, the radio was only used for long-distance wireless communication. But in radio’s development, it was also used for commercial broadcasting. Commercial broadcasting started since 20s. Commercial radio broadcasts is not only news and music, but also include drama, comedy, variety shows, and others entertainment.
Nowadays, Radio has been developing. Radio has some advantages and weaknesses compared with others electronic communications. The advantages of the radio are communicating information quickly and can be enjoyed by everyone. While the weaknesses of the radio are can not repetition in broadcasting and have no visualization.
______________________________________________________
sources:
1. http://id.wikipedia.org/wiki/Radio
2. http://media.isnet.org/iptek/100/Marconi.html
3. http://id.answers.yahoo.com/question/index?qid=20090829071726AAjP50T
4. http://periodismoenlinea.wordpress.com/2008/01/29/kekurangan-dan-kelebihan-media/
5. http://sman11mks.com/index.php?option=com_kunena&func=view&id=33480&catid=64&Itemid=76
Tidak ada komentar:
Posting Komentar