April 22, 1977
Optical fiber is first used to carry live telephone traffic.
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Commentary
On April 22, in the year 1977:
Optical fiber is first used to carry live telephone traffic.
An optical fiber, or optical fibre, is a flexible glass or plastic fiber that can transmit light from one end to the other.
Why April 22, 1977 matters:
Optical fiber is first used to carry live telephone traffic.
What began on this day left a lasting mark on history. The effects were felt immediately and continued to shape events, ideas, and lives long afterwards.
Historical context: April 22, 1977
The 20th century brought rapid advances in health, communication, science, and technology that reshaped everyday human experience.
The event on this day: Optical fiber is first used to carry live telephone traffic.
Source: https://en.wikipedia.org/wiki/Optical_fiber (Wikipedia, CC BY-SA)
Sources: Wikipedia (CC BY-SA)
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