Broadcasting is the distribution of audio or video content to a dispersed audience via any electronic mass communications medium, but typically one using theelectromagnetic spectrum(radio waves), in a one-to-many model.Broadcasting began with AM radio, which came into popular use around 1920 with the spread of vacuum tube radio transmitters and receivers.Before this, all forms of electronic communication (early radio,telephone, and telegraph ) were one-to-one, with the message intended for a single recipient. The term broadcasting evolved from its use as the agricultural method of sowing seeds in a field by casting them broadly about.It was later adopted for describing the widespread distribution of information by printed materials or by telegraph. Examples applying it to “one-to-many” radio transmissions of an individual station to multiple listeners appeared as early as 1898.
A broadcaster is someone who gives talks or takes part in interviews and discussions on radio or television programmes.
The sequencing of content in a broadcast is called a schedule.Broadcasting focuses on getting a message out and it is up to the general public to do what they wish with it. There are many forms of broadcasting, but they all aim to distribute a signal that will reach the target audience. Broadcasters typically arrange audiences into entire assemblies.The world’s technological capacity to receive information through one-way broadcast networks more than quadrupled during the two decades from 1986 to 2007, from 432 exabytes of (optimally compressed) information, to 1.9 zettabytes This is the information equivalent of 55 newspapers per person per day in 1986, and 175 newspapers per person per day by 2007.