Optical Communication - Study Mode
[#86] In an optical communication system, having an operating wavelength λ in meters, only X% of its source frequency can be used as its channel bandwidth. The systems is to be used for transmitting TV signal requiring a bandwidth of f Hz. The number of channels transmitted by this system simultaneously is (c = speed of light)
Correct Answer
(D) $$frac{{Xc}}{{100lambda f}}$$
[#87] The cut-off wavelength for an optical fibre with 5 µm core diameter and core cladding indices of refraction 1.84 and 1.402 is nearly
Correct Answer
(C) 3 µm
[#88] Which one of the following statements is NOT true for a step index optical fibre?
Correct Answer
(C) The refractive index of the cladding is higher that of the core
[#89] In an opto-electronic communication system, the system component in which free electrons are involved in its operation is
Correct Answer
(C) Photo detector
[#90] 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. 10 4 m b. Local television system 2. 10 2 m c. FM broadcasting 3. 10° m d. Satellite 4. 10 -2 m 5. 10 -6 m
Correct Answer
(A) a-5, b-3, c-3, d-4