COM-224 Lecture Notes - Lecture 3: Texas Instruments, Katy Perry, Non-Commercial
27 Sep 2016
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Sending electrical impulses from a transmitter through a cable to a reception point ! Morse code (series of dots and dashes that stood for letters in the alphabet)! Unable to transmit the human voice, ships at sea also could not communicate, couldn"t have wires connected to the ships at sea, nobody knew what was going on in the world by see! James maxwell - he theorized the existence of electric magnetic waves (radio waves) would be harnesses so that they could be sent from point to point ! Created device that permitted an electrical spark to leap across a small gap! First recorded transmission and reception of an electromagnetic wave! Hertz pulled off what maxwell could not! Used a herts spark transmitter recording signals on to narrow strips of paper ! Formed marconi wireless telegraph company - british marconi 1897! Early in the year he successfully sends wireless channels across the english channel, then across the atlantic !
