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Optical Communication MCQ Questions & Answers | ECE

Learn Optical Communication MCQ questions & answers are available for a Electronics and Communications Engineering(ECE) students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Optical Communication MCQ question is the important chapter for a Electronics and Communications Engineering(ECE) and GATE students. Page-4 section-1

Each section contains 100 MCQs on Optical Communication .
31
The light sources used in fibre optics communication are . . . . . . . .
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Answer & Solution
Answer: Option A
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32
Which of the following is not a metallic impurity found in glass in extrinsic absorption?
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Answer & Solution
Answer: Option D
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33
What is dispersion in optical fiber communication?
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Answer & Solution
Answer: Option B
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34
A step-index fiber has core refractive index 1.46 and radius 4.5μm. Find the cutoff wavelength to exhibit single mode operation. Use relative index difference as 0.25%.
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Answer & Solution
Answer: Option C
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35
The phenomenon which occurs when an incident wave strikes an interface at an angle greater than the critical angle with respect to the normal to the surface is called as . . . . . . . .
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Answer & Solution
Answer: Option C
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36
Constructive interference occur when total phase change after two successive reflections at upper and lower interfaces is equal to? (Where m is integer)
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Answer & Solution
Answer: Option A
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37
One of the given statements is true for intermodal dispersion. Choose the right one.
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Answer & Solution
Answer: Option A
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38
Consider a single mode fiber having core refractive index n1 = 1.5. The fiber length is 12m. Find the time taken by the axial ray to travel along the fiber.
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Answer & Solution
Answer: Option B
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39
A single-mode step-index fiber or multimode step-index fiber allows propagation of only one transverse electromagnetic wave.
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Answer & Solution
Answer: Option A
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40
Numerical aperture is constant in case of step index fiber.
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Answer & Solution
Answer: Option A
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