a) Explain the conditions necessary for total internal reflection of light at the interface between twomedia. (at least 50 words)b) Describe and explain the structure of an optical fibre. (at Least 70 words)Completed forms to be made available for external moderation.c)Complete the following ray diagrams of optical fibres accurately. Use a ruler and a pencil to showhow the rays are reflected along the fibre. For each diagram, show the positions of the normal lines.Use a protractor to measure the angles of reflection accurately.A00

Answer to question a ) Total internal reflection of light occurs when light travels from a medium…

a) Explain the conditions necessary for total internal reflection of light at the interface between two media. (at least 50 words) b) Describe and explain the structure of an optical fibre. (at Least 70 words)

a) Explain the conditions necessary for total internal reflection of light at the interface between two media. (at least 50 words) b) Describe and explain the structure of an optical fibre. (at Least 70 words)

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter38: Refraction And Images Formed By Refraction

Section: Chapter Questions

Problem 87PQ

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Light travels from air into a fluid which has a refractive index of 1.55. The angle of incidence is 41o.a)Calculate sin of the angle of incidence. Give your answer to 3 decimal places and use it to this accuracy in any subsequent calculations, if needed. Hint: make sure your calculator is on degrees (not radians or grads). b)Calculate the angle of refraction (in degrees). Take the index of refraction of air as 1.Make sure you do all working to at least 3 decimal places. Give your answer to 1 decimal place. c)Light travels out of the fluid into air at the critical angle. What is the angle of refraction (in degrees)? Give your answer as a whole number. d)Calculate the critical angle (in degrees). Give your answer to 1 decimal place.
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A ray is directed at a glass–air interface and total internal reflection occurs at the criticalangle. If a thick layer of water is then poured on top of the glass. Which of the followinghappens?(Remember: Water has an index of refraction between that of glass and air.) A. The ray is still totally internally reflected at the glass interface.B. The ray is now totally internally reflected at the water–air interface.C. The ray is no longer totally internally reflected anywhere.D. The answer depends on the angle of incidence on the glass–water interface.
a. Given the pattern of light on the far side of the prism, is the index of refraction inside the prism higher or lower than the index of refraction outside the prism? b. List at least one thing that is wrong with this diagram given what we expect the dependence of n on the wavelength of light to be (and assuming the prism is made of a uniform material). c. List at least one thing that is right with this diagram given what we expect the dependence of n on the wavelength of light to be (and assuming the prism is made of a uniform material).
Snell's Law and the Law of Reflection explain how light is redirected when it encounters a surface between two media. In the extreme, light may only reflect at a boundary, and go back into the medium it was in. More often, some of it reflects and some goes through. If the boundary is plane and flat, then these laws are easy to interpret. When the boundary is curved, they describe what happens at every point on the surface. One of the class types of glass is called "crown" glass, which has an index of refraction for visible light of 1.52 and is usually free of significant impurities. It was one of the first glasses discovered, and windows are made from it. Another glass is called "flint" glass, and it has lead oxide added, which makes it heavier, more "dispersive" and colorful, and increases its index of refraction to 1.62. 1. As a check, the guiding rule is that light entering a transparent material such as glass takes a path bent more toward the normal inside than it had outside.…
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A ray of light strikes a flat, 2.00-cm-thick block of glass (n = 1.52) at an angle of ? = 37.4° with respect to the normal (see figure below). a.) Find the lateral distance d by which the light beam is shifted. b.) Calculate the time required for the light to pass through the glass block.
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