The key optical property which allows fibre optic cables to function is a. total internal refraction...
The key optical property which allows fibre optic cables to function is
a. total internal refraction
b. polarization
c. total internal reflection
d. refraction
e. reflection
??
Homework Answers
answer:
(C)
Total internal reflection.
Explanation
When light traveling in an optically dense medium hits a boundary at a steep angle (larger than the critical angle for the boundary), the light is completely reflected. This is called total internal reflection. This effect is used in optical fibers to confine light in the core.
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The key optical property which allows fibre optic cables to
function is
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11. A laser beam enters a fibre optic cable as shown in the cross-section below. The...
11. A laser beam enters a fibre optic cable as shown in the cross-section below. The core of the cable has index of refrac- tion n2 and is surrounded by cladding with index of refraction n3. ni = 1.00 is the index of refraction of air. If 01 = 63.1° and 02 = 20.6°, what is the maximum value of n3 for which the beam undergoes total internal reflection and propagates down the cable? (ans. 2.37] n N₃ n, 2.82
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Problem 1: Fibre optics (2 points) Figure 1: Sketches of the geometry of an optical fibre A long cylinder of dielectric material can guide light via total internal reflection. This idea dates back to the 1870s and forms the basis of the modern fibre optics communication technology. As long as the diameter of these fibres is large compared to the wavelength of the infalling light, its wave nature is negligible and we can use Geometric Optics to study the propagation...
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The index of refraction of germanium is 5.5. The critical angle for total internal reflection, at...
The index of refraction of germanium is 5.5. The critical angle for total internal reflection, at germanium/air interface is about: A. 80o B. 34o C. 60o D. None of the above
The index of refraction of germanium is 5.5. The critical angle for total internal reflection, at...
The index of refraction of germanium is 5.5. The critical angle for total internal reflection, at germanium/air interface is about: A. 80° B. 34° C. 60° D. None of the above
Some biological systems can act like an optical fiber. Below is a drawing which illustrates how...
Some biological systems can act like an optical fiber. Below is a drawing which illustrates how this might occur. Imagine you have a long, thin cell surrounded by fluid with index of refraction 1.38. The average index of refraction inside the cell is 1.48. Compute the critical angle, theta_crit, for total internal reflection for this system. Show all of your computations. What will the angle of refraction be for ray A (shown below) that has an angle of incidence of...
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Venus plc (Venus) manufactures fibre optic cables. This is an increasingly competitive market and the Chief Financial Officer (CFO) of Venus has suggested that the company's pricing policy should change. Specifically, he has suggested that Venus' quotation for a new contract should be based on target costing. The costs relevant to this are listed below and the prices in this market are all quoted on a per metre basis: Target price $196 per metre of cable. The contract is estimated...
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Questions on Reflection and Refraction: A) What are the units of the index of refraction? B) What is total internal reflection? Explain in what situation you would find it and the formula involved. C) What is the law of reflection? D) Go to the last website and explain the secret of the archer fish. Draw pictures and explain why it works from a physics point of view. https://www.physicsclassroom.com/class/refrn/Lesson-1/If-I-Were-an-Archer-Fish E) A light beam in air is incident on a glass slab...
11. A laser beam enters a fibre optic cable as shown in the cross-section below. The core of the cable has index of refrac- tion n2 and is surrounded by cladding with index of refraction n3. ni = 1.00 is the index of refraction of air. If 01 = 63.1° and 02 = 20.6°, what is the maximum value of n3 for which the beam undergoes total internal reflection and propagates down the cable? (ans. 2.37] n N₃ n, 2.82
Problem 1: Fibre optics (2 points) Figure 1: Sketches of the geometry of an optical fibre A long cylinder of dielectric material can guide light via total internal reflection. This idea dates back to the 1870s and forms the basis of the modern fibre optics communication technology. As long as the diameter of these fibres is large compared to the wavelength of the infalling light, its wave nature is negligible and we can use Geometric Optics to study the propagation...
The index of refraction of germanium is 5.5. The critical angle for total internal reflection, at germanium/air interface is about: A. 80° B. 34° C. 60° D. None of the above
Some biological systems can act like an optical fiber. Below is a drawing which illustrates how this might occur. Imagine you have a long, thin cell surrounded by fluid with index of refraction 1.38. The average index of refraction inside the cell is 1.48. Compute the critical angle, theta_crit, for total internal reflection for this system. Show all of your computations. What will the angle of refraction be for ray A (shown below) that has an angle of incidence of...
Venus plc (Venus) manufactures fibre optic cables. This is an increasingly competitive market and the Chief Financial Officer (CFO) of Venus has suggested that the company's pricing policy should change. Specifically, he has suggested that Venus' quotation for a new contract should be based on target costing. The costs relevant to this are listed below and the prices in this market are all quoted on a per metre basis: Target price $196 per metre of cable. The contract is estimated...
In charged particle detectors we often use optical fibers to guide light emitted from charged particles (through scintillation or Cherenkov radiation) in one section of the detector to optically sensitive photodetector devices at another section of the detector, so that the emitted light can be detected, recorded and later analyzed. After entering the optical fiber (you can assume the light enters from a region of just air), the light is guided from one end of the optical fiber to the...
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