Answer:The telegraph was a device that could send information over wires across great distances. The telegraph sent pulses or surges of electrical current through wire. The telegraph operator tapped a bar called the telegraph key, that controlled the length of the pulse. At the other end of the wire these pulses changes into clicking sounds. A short click was called a dot. A long click was called a dash. Alfred Lewis developed morse code, different combinations of dashes and dots that reperent a letter of the alphabet. This is how morse code worked.
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