Check your understanding

Exercise 1. Answer the following questions.

1. Why was the use of fiber optics generally not available until 1970?

2. What could you tell about the applications of fiber optics by telephone companies?

3. How do different cable television companies and LAN systems use optical fiber communications?

4. Why are some power companies so interested in application of fiber optics?

5. Why is it possible to say that fiber optics has become the industry standard for terrestrial transmission of telecommunication information?

Exercise 2. Complete the sentences given below.

1. Until 1970 the use of the fiber optics was …

2. The choice is not whether to convert to optical fiber, but …

3. The optical receiver converts the light impulses …

4. Colleges, universities, office buildings, etc make use of …