Question

If a parabolic profile is used for a refractive index in the core, what is the name given to such a core?
A. single mode core
B. multi mode core
C. differential mode core
D. curvilinear differential core

Answer 1

Hint: Different types of profiles are used as a core of an optical fiber which helps it carry optical images over a long distance. There are losses in the optical fiber during the transmission of optical images; due to this, there is a need to introduce core arises.

Complete step by step answer:
We have to define the parabolic profile name used for the refractive index in the core.
Round optical fibers use the concept of total internal reflection in the vicinity of the inside of the fiber tube. These fiber tubes are thin and used to carry optical images to a considerable distance. Optical fibers are losses when carrying optical images, and these losses are due to three phenomena: polarization, Raman scattering, and diffraction. If we use a core of varying refractive index along its radial direction, we will minimize the loss caused by diffraction. Also, if the profile of the core is parabolic, the loss is at its minimum value. We also know if the profile of the core is parabolic, it is called curvilinear differential core.

Therefore, based on the above explanation, we can say that if the parabolic profile is used for the refractive index in the core, it is called a curvilinear differential core

So, the correct answer is “Option D”.

Note:
 If the scattering of photons of a beam light is inelastic when it strikes the surface of matter, their energy is exchanged.
Hence,The direction of the photon's beam will change.