Download
1 / 2
20 likes | 151 Vues
Explore the fascinating history of communication technology, beginning with the development of perfectly transparent optical fibers made from pure glass. Discover how the first optical signals were sent over long distances, and the impact of innovations like the patented telephone. Understand the challenges posed by obstacles and weather conditions, and how these technologies evolved from the 1858 undersea telegraph cable to modern internet systems. Learn about various applications, from military uses to medical diagnostics, illustrating how interconnected our world has become.
E N D
(Cost), audio delay (¼ second) • 1000 trillion • Doctors (medical) • Touching other fibers (scratches,finger oil) • Perfectly transparent fiber (pure glass) • (pure) Sand • 10 km • The Internet (phone) • Hamilton (or Toronto) • Military, space station • Many are still in use • With fire beacons • Weather (visibility poor, rain/cloud/mist) • War was over • 1858 • Sending signals as notes, combining messages on wire • Patented telephone • Water • Turn signal on & off (wink on & off) • Can’t travel as far, obstacles get in way
Note: students may have difficulty with 5,8,12, and 14 For more lessons, visit www.chalkbored.com
