The very first radios were "sparkgap radios" (e.g. Marconi's radio). They could only be used for radio telegraphy (i.e. sending telegrams).
The transmitter was a high voltage sparkgap connected to a long antenna wire. A message was sent by applying a high voltage across the sparkgap each time the operator pressed the telegraph key, generating a spark and causing the antenna wire to radiate very wideband electromagnetic noise.
The receiver was a low voltage sparkgap connected to a long antenna wire. When the antenna picked up any electromagnetic noise the sparkgap would spark while that noise was being picked up. However it was not practical to look for this spark, so a device called a "coherer" was used to detect the spark and generate a signal to drive a conventional telegraph sounder. The coherer was a glass tube full of iron filings with an electrode at each end touching the filings, usually the filings made poor contact and the resistance of the coherer was high; but when the voltage across the sparkgap became high enough to spark as the coherer was across that sparkgap this voltage caused the filings to cohere and the resistance of the coherer to became low, energizing the telegraph sounder. Unfortunately the iron filings in the coherer stayed stuck together causing the resistance to stay low, so a small electromagnetically operated hammer tapped the coherer each time it activated to knock the filings apart and reset it to its normal high resistance state, deenergizing the telegraph sounder.
The biggest problem with such radios was the wideband electromagnetic noise they used did not permit more than one station to transmit at a time, if more than one station transmitted at the same time the result was an unintelligible garble!
A long long time ago, when the radio did not exist. Dinosaurs roamed the earth, killing innocent children EVEN SANTA CLAUSE !
people passed down the stories of generations before them through oral tradition
I don't think this question is answerable. It might be better formulated as one of these questions: * What would the world be like if people were not greedy? * What would the world be like if money was never invented? * What would the world be like if communism could work?
No. There would have been other ones before it, like word processors.
normal..to be honest nothing specail
Basically, yes. They made books like the Book of Kells and other books.
Like a world without rubik's cubes! Who even invented it?
Discover and inventions are totally different. Discover is the thing it is exist in the world whic was find by one like stars satellites Invention is the new thing find by one like radio tv etc. Radio is invented by Marconi
Slow and very inconvenient! and people use bicycle with wooden wheels
Radios had long been invented in 1980. Only thing left to invent would be a novel item to add a radio to. maybe a radio toaster, a radio fishing ros, something like that.
Candle lighting in night or in dark. Chinese lantern is popular in eastern world.
joshua nathaniel chad crooks
most families would gather around a radio for entertainment and gathering of the latest news and knowledge. Or go to the cinema to watch the latest "Movietone News" newsreel.
What Was Life Like before The Helicopters Were Invented And So On The Is For My Project Research So Please Respond.
first of all the battery was invented, but to answer your your question children did not have cool toys, no computers, no tvs, machines the list gos on.
Colour was invented because I don't like the world being in black and white.
life was rough then easy
Telegraphs, typewriters and much much more.