Definitions
There is 1 meaning of the phrase
Optical Telegraph.
Optical Telegraph - as a noun
Any telegraph that uses visual signals to convey a message, including the use of smoke signals, beacons or reflected light, which have existed since ancient times.
Example Sentences
"The optical telegraph was an early form of long-distance communication that used a system of visual signals."
"During the nineteenth century, optical telegraphs were widely used across Europe for transmitting messages."
"The optical telegraph was invented by Claude Chappe in France in the late 18th century."
"The optical telegraph relied on a series of towers with movable arms to spell out messages."
"The optical telegraph system allowed transmission of information at a faster pace than traditional methods."
