Question

In an optical fiber, the core material has refractive index 1.6 and refractive index of clad material is 1.3. What is the value of critical angle?

Answer 1

Explanation:

given refractive index of core(n1)=1.6

refractive index of clad(n2)=1.3

from Snells law,

n1 sin i =n2 sin r

sin c=1.3/1.6

c=54.34°

Answer 2

Answer:

the correct answer is 54.34 degree

Explanation:

Given Data :

• The refractive index of core = 1.6
• The refractive index of clad material = 1.3

Formula to be used :

Snell's law:

(n1 sin i = n2 sin r)

sin i / sin r = 1.3/1.6

sin c = 0.8125

So, c = 54.34 degrees

• The angle of incidence, for which the angle of refraction is 90°, is the critical angle. Light changes direction and bends toward the normal if it enters a denser medium from one that is relatively more uncommon.
• A flexible, transparent fibre known as an optical fibre is created by pulling glass or plastic to a diameter just a hair's width thicker. It is non-flammable and uses less power.
• Total internal reflection is the basis for how the optical fibre functions.
• Large amounts of data can be transmitted using light rays, but there is a drawback: they move in straight lines.
• So, exploiting this advantage will be time-consuming unless we have a long, straight line without any bends.
• . Instead, all light beams are bent inward by the optical cables' unique architecture (using TIR)

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