Appendix: Answers to Review Questions

Chapter 1: History of Fiber Optics and Broadband Access

  1. B. Light travels at approximately 300,000 kilometers per second in air, and it allowed simple messages to be sent quickly over great distances through the use of signal fires.
  2. C. The demonstrations performed by Colladon, Babinet, and Tyndall proved that light could be guided through water if the air around it had a lower index of refraction. This demonstrated the principle of total internal reflection.
  3. A. Doctors and researchers experimented with bent glass and quartz to create a device that would allow them to see inside the body with minimal intrusion.
  4. D. In 1966, Charles K. Kao announced that signal losses in glass fibers could be reduced to 20 ...

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