What Is RFID and How Does It Work?
Radio-frequency identification (RFID) is a technology that uses communication via radio waves to exchange data between a reader and an electronic tag attached to…
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Antenna
What Is Radar and Its Application?
The word radar is an acronym for Radio Detection And Ranging created in 1942. This acronym replaced the British initials RDF (Radio Direction Finding).…
Who Made the First Dish Telescope?
The first dish (or radio) telescope was made in 1942 by an American, Grote Reber, of Wheaton, Illinois. He constructed his apparatus after s
Who Invented Radar?
Who Invented Radar? Heinrich Hertz in Germany calculated that an electric current swinging very rapidly back and forth in a conducting wire
How Does the Radio Antenna Work?
How Does the Radio Antenna Work? The radio antenna on a car or on your home set is like an ear, listening for radio waves sent out by broadc