By the Numbers
Numbers help us understand things. They tell us how big something is, how far away it is, how much time passes and a bunch more. Let’s explore the numbers for fiber optics.
1. The first commercial fiber optic installations occurred about _____ years ago.
Correct Answer: 50
2. Some of the oldest fiber optic cables still in use, optical power ground wire used in electrical transmission networks, are _____ years old.
Correct Answer: 40
3. Glass optical fiber, with a diameter of _____, is about the size of a human hair.
Correct Answer: 125 microns
4. Fiber optics terms are usually expressed in the metric system. In the English system, optical fiber is about _____ inches in diameter.
Correct Answer: 0.005
5. Multimode fiber attenuates a signal by about half or _____ decibels (dB) in 1 kilometer.
Correct Answer: 3
6. A typical fusion splice with single-mode fiber has a loss of _____ dB.
Correct Answer: 0.1
7. TIA standard TIA-568 says the connection loss with two mated connectors should be less than _____ dB.
Correct Answer: 0.75
8. In the race to get more data through an optical fiber cable, manufacturers have made cables with up to _____ fibers.
Correct Answer: 6,912
9. Data rates have gotten faster in fiber optics, with speeds over _____ now being used routinely.
Correct Answer: 100 gigabits/second
10. More fibers, faster speeds and even up to _____ wavelengths can be multiplexed on a single fiber to enhance data capacity.
Correct Answer: 100
Score: