Two.Tesla andEdison
the radio was not invented in the 1920s, but it came out in the 1920s when people could buy them
they used the radio to tell people news
before the radio was invented, people and countries sent messages/letters carried by messengers to the destination wherever it may be located.
Trevor Baylis. for people in Africa
talk or write a letter
People were more informed and also used the radio as a form of entertainment.
Marconi was 20 when he invented the radio.
The radio has gone through many changes including a switch from analog to digital. The first digital radio was invented in the late 1960s.
To warn people when emrgencies were happening and too entertain with music
yes gugelimo marconi invented the radio
The first car radio was invented in 1929.
jamie ranson invented the radio in 1954