51. In an opto-electronic communication system, the system component in which free electrons are involved in its operation is
52. Match List-I wish List-II and select the correct answer the correct answer using the options given below:
List-I (System)
List-II (Order of wavelength)
a. Optical fiber communication
1. 104 m
b. Local television system
2. 102 m
c. FM broadcasting
3. 10° m
d. Satellite
4. 10-2 m
5. 10-6 m
| List-I (System) | List-II (Order of wavelength) |
| a. Optical fiber communication | 1. 104 m |
| b. Local television system | 2. 102 m |
| c. FM broadcasting | 3. 10° m |
| d. Satellite | 4. 10-2 m |
| 5. 10-6 m |
53. In the SONET, form the Synchronous Transport Signal (STS), Optional Carrier (OC) is obtained
54. A fibre-optic cable has the indices of refraction of core of 1.6 and of cladding of 1.4, For an angle of incidence 70°, the angle of return light ray will be
55. What type of wiring does ISDN use?
56. A single-mode optical fiber has a beat length of 8 cm at 1300 nm. The value of birefringence Bf will be nearly
57. The local loop is
58. Assuming no ISI, the maximum possible bandwidth of a multimode graded index fiber with 5 MHz, shows the total pulse broadening of 0.1s for the distance of about 12 km. What would be the value of bandwidth length product?
59. An optical fibre has refractive index core
60. The response time of photodiode depends on
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