What is Radio?
As a noun it could be the transmission and reception of electromagnetic waves of radio frequency, especially those carrying sound messages.
Plural noun: radios Use it in a sentence: “Cellular phones are linked by radio rather than wires:
It can mean radio programs. “We used to listen to a lot of radio”
It can be: an apparatus for receiving radio programs. "She turned on the radio"
It can be an apparatus capable of both receiving and transmitting radio messages between individuals, ships, planes, etc. -"a ship-to-shore radio"
Remember a couple of weeks ago we talked about synonyms: words that mean the same thing.
What are some synonyms for radio: transceiver, CB, walkie-talkie, ship-to-shore radio, radio phone:
Radio can also mean: a broadcasting station or channel: "Monitor Radio"
Radio used as a verb
As a verb: communicate or send a message by radio. "The pilot radioed for help"
History of Radio
We are examining “Radio” as a medium, a means of communication. !
Many people worked to make radio possible. Heinrich Rudolf Hertz in Germany first showed that radio waves exist.
We want to explore the technology of radio so that you can completely understand how invisible radio waves make so many things possible!
Radio owes its development to two other inventions, the telegraph and the telephone, all three technologies are closely related. Radio technology began as "wireless telegraphy".
What are radio waves?
Radio waves are an invisible form of electromagnetic radiation. "Radio waves" transmit music, conversations, pictures and data invisibly through the air, often over millions of miles -- it happens every day in thousands of different ways! Even though radio waves are invisible and completely undetectable to humans, they have totally changed society.
Whether we are talking about a cell phone, a baby monitor, a cordless phone or any one of the thousands of other wireless technologies, all of them use radio waves to communicate.
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