"Optical instruments" Essays and Research Papers

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    Submarine Cables

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    Polyethylene 2. "Mylar" tape 3. Stranded metal (steel) wires 4. Aluminum water barrier 5. Polycarbonate 6. Copper or aluminum tube 7. Petroleum jelly 8. Optical fibers These fibre optic cables carry DWDM (http://en.wikipedia.org/wiki/Wav...) laser signals ( TCP/IP packets etc. ) at a rate of terabytes per second. They use optical repeaters to strengthen the signal which attenuates over long distances. These are powered by copper cables shown above. They have a decade lifespan and costs

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    Optical Distortion‚ Inc. Case Analysis Mengyuan(Myra) Xu A20266661 2011-12-08 2011-12-05 MC 510 Optical Distortion‚ Inc. Case Meangyuan (Myra) Xu CONTENT EXECUTIVE SUMMARY ...................................................................................................................... 2 INTRODUCTION .................................................................................................................................... 2 ANALYSIS ............................................

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    Study Guide

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    Study guide for Microbiology Chapter 2 Name________________ 1. List and describe the sequence steps routinely used to identify bacteria. These are referred to as the “five I’s” in your text. 2. Define / describe each of the following as they apply to microbiology: a. Culture f. pure culture b. Inoculum g. contaminated culture c. Inoculation h. mixed culture d. Colony 3. Microbiologists employee a number of approached to acquiring a pure culture

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    Fiber Optics

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    Fiber Optics Fiber Optic Cable Facts "A relatively new technology with vast potential importance‚ fiber optics is the channeled transmission of light through hair-thin glass fibers." [ Less expensive than copper cables [ Raw material is silica sand [ Less expensive to maintain If damaged‚ restoration time is faster (although more users are affected) [ Backbone to the Information Superhighway Information (data and voice) is transmitted through the fiber digitally by the use of high

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    than that of classical information technologies. Because they are light‚ flexible and user-friendly. The speed of information transmission is increasing as mail is replaced by electronic message transmission‚ New networks (especially those using optical fiber) are now capable of transporting data‚

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    Tutorial

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    60˚+60˚+ (90˚+41.4˚)+(90˚+ 3)=3 60˚ c) 1.46sin18.6 = 1sin d) 5= 4 75 (75˚2)+( 43) 3 2 QUESTION 2: a) A glass fiber (n=1.50) is submerged in water (n = 1.33). what is the critical angle for light to stay inside the optical fiber? Hint: For light to stay within the optical fibre‚ it must be incident on the air-glass interface at angle greater than the critical angle. Use Snell’s law n1sin 1=n2 sin 2 with 2 = 90˚. Solution: 1.50sin 2=1.31 b) Determine the maximum angle for which the light

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    nt 1310

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    floors‚ and above drop ceilings when used to circulate and otherwise handle air in a building. Riser: A space for indoor cables that allow cables to pass between floors‚ normally a vertical shaft or space. RIP cord: A length of string built into optical fiber cables that is pulled to split the outer jacket of the cable without using a blade Core: Anything that is found within the sheath‚ usually just the twisted pairs. Commonly referred to incorrectly as the core‚ when actually it’s the conductor

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    RESEARCH PAPER REVISION COM220 RESEARCH PAPER REVISION COM 220 July 3‚ 2013 Negative Impact of Standardized Testing Jonathan Kozol‚ author of The Shame of the Nation: The Restoration of Apartheid Schooling in America‚ stated that “There is something deeply hypocritical in a society that holds an inner-city child only eight years old “accountable” for her performance on a high-stakes standardized exam but does not hold the high officials of our government accountable for robbing

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    chosen is called Cultural Differences in the Perception of Geometric Illusions. The research specifically focused on the psychological processes of depth perception and visual perspective. The first example is the Muller-Lyer illusion which is an optical illusion consisting of stylized arrows in which viewers tend to perceive one as longer than the other. The second example used is the Sanders Parallelogram in which a diagonal line bisecting the larger‚ left-hand parallelogram appears to be slightly

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    Transmitting Bits

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    Dennis Thrane NT 1210 Unit 4 Lab 10/12/2014 Exercise 4.1.1 Why are standards so important for NICs‚ connectors‚ and media? Use your textbook and Internet research to justify your answer. The physical level determines how the 0 and 1 bits are identified. So both ends need to know the voltage range for a 1 and for a 0. If they used different values then the data would be lost‚ or the voltage at the destination may be so high that the current delivered to the destination could destroy the receiver.

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