alleryWho built the first fixed visual telegraph (semaphore) line between Lille and Paris in 1792?
AClaude Chappe
BSamuel Morse
CAlexander Bell
DGuglielmo Marconi
Answer & Solution
Correct answer: A. Claude Chappe
1. Before electricity, visual systems like semaphores carried messages.
2. In 1792 French engineer Claude Chappe built the first fixed line between Lille and Paris.
3. Morse, Bell and Marconi worked on electrical or radio systems.
_Source: Wikipedia, Telecommunications, Before the electrical and electronic era_
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