HIGHLIGHTED-Fiber-Optics-Communications.docx

A kapany b kao c bockham d keck 160 they wrote a

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A. Kapany B. Kao C. Bockham D. Keck 160. They wrote a paper describing how it was possible to use stimulated emission for amplifying light waves (laser) as well as microwaves (maser). A. Theodore Maiman B. KC Kao and GA Bockham C. Charles Townes and Arthur Schawlow D. Kapron, Keck and Maurer 161. The scientist who built the first optical maser A. Charles Townes B. GA Bockham C. Theodore Maiman D. ACS Van Heel 162. A single fiber can handle as many voice channels as A. a pair of copper conductors B. a 1500-pair cable C. a 500-pair cable D. a 1000-pair cable 163. They proposed a new communication medium using cladded fiber cables. A. Kao and Bockham B. Maiman, Kao and Bockham C. Kapron, Keck and Maurer D. Maiman and Schawlow 164. An incident ray can be defined as A. a light ray reflected from a flat surface B. a light directed toward a surface C. a diffused light ray D. a light ray that happens periodically 165. Developed an optical fiber with losses less that 2 dB/km A. Kao and Bockham B. Maiman, Kao and Bockham C. Maiman and Schawlow D. Kapron, Keck and Maurer 166. The band of light frequencies that are too high to be seen by the human eye. A. Ultraviolet B. Visible light C. Infrared D. Yellow 167. Which of the following is the fastest light sensor? A. PIN photodiode B. Photovoltaic diode C. Photodiode D. Avalanche photodiode 168. Range of infrared A. 360 nm to 440 nm B. 670 nm to 10^3 nm
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C. 110 nm to 240 nm D. 770 nm to 10^6 nm 169. The term dispersion describes the process of A. separating light into its component frequencies B. reflecting light from a smooth surface C. the process by which light is absorbed by an uneven rough surface D. light scattering 170. The band of light frequencies to which human eye will respond A. Infrared B. Visible light C. Ultraviolet D. Cosmic ray 171. Laser light is very bright because it is A. pure B. white C. coherent D. monochromatic 172. Which of the following is the fastest light sensor? A. PIN photodiode B. Photovoltaic diode C. Photodiode D. Avalanche photodiode 173. Range of wavelength of visible light A. 670 nm to 10^3 nm B. 440 nm to 540 nm C. 110 nm to 240 nm D. 390 nm to 770 nm 174. The band of light frequencies that are too low to be seen by the human eye A. Infrared B. X-rays C. Visible D. Ultraviolet 175. Which of the following terms best describes the reason that light is refracted at different angles? A. Photon energy changes with wavelength B. Light is refracted as a function of surface smoothness C. The angle is determined partly by a and b D. The angle is determined by the index of the materials 176. Range of wavelengths of ultraviolet A. 670 nm to 10^3 nm B. 440 nm to 540 nm C. 110 nm to 240 nm D. 10 nm to 390 nm 177. Single frequency light is called A. pure B. intense C. coherent D. monochromatic 178. The coating in a fiber helps protect fiber from
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