OCN-UNIT-2 Q4

1.What is bending loss in optical fibers?

• A) Loss of signal due to the absorption of light within the fiber

• B) Loss of signal that occurs when an optical fiber is bent too tightly, causing light to escape from the core

• C) Loss of signal due to the scattering of light within the fiber

• D) Loss of signal caused by imperfections in the fiber's material

2.Which type of bending in optical fibers typically causes higher bending loss?

• A) Micro-bending

• B) Macro-bending

• C) Light bending

• D) Elastic bending

3.What is the main cause of bending loss in optical fibers?

• A) Reflection of light at the fiber ends

• B) Increase in the refractive index
  

• C) Leakage of light from the fiber core

• D) Increase in light intensity

4.How can bending loss be minimized in optical fibers?

• A) By using a fiber with a smaller core diameter

• B) By ensuring that the fiber is not bent beyond its minimum bend radius

• C) By increasing the power of the light source

• D) By using longer optical fibers

5.Which of the following is NOT a factor that influences bending loss?

• A) Wavelength of light

• B) Radius of curvature

• C) Length of the optical fiber

• D) Core diameter of the fiber

6.What happens to the bending loss when the bend radius of the fiber is reduced?

• A) Bending loss decreases

• B) Bending loss remains constant

• C) Bending loss increases

• D) Bending loss becomes zero

7.In which part of an optical fiber does the majority of bending loss occur?

• A) Cladding

• B) Core

• C) Buffer coating

• D) Jacket

8.Bending loss is most significant in which type of optical fiber?

• A) Multimode fibers with a large core

• B) Single-mode fibers with a small core

• C) Plastic optical fibers

• D) Hollow-core fibers

9.Which of the following methods can reduce bending loss in an optical fiber installation?

• A) Increasing the number of bends in the fiber path

• B) Using a cable with a smaller bend radius specification

• C) Installing the fiber with gentle bends and large bend radii

• D) Reducing the core diameter of the fiber

10.Why does bending loss increase at shorter wavelengths?

• A) Because light is more likely to be absorbed

• B) Because shorter wavelengths are more sensitive to changes in the refractive index

• C) Because shorter wavelengths have less diffraction

• D) Because the bending angle increases with shorter wavelengths