Experiment 9: THE TANGENT GALVANOMETER; PURPOSE: In this experiment we will measure the magnitude of the horizontal component of the Earth’s Magnetic field by the use of an instrument called a tangent galvanometer. INTRODUCTION: A tangent galvanometer consists of a number of turns of copper wire wound on a hoop. At the center of the hoop a compass is mounted. When a direct current flows through the wires‚ a magnetic field is induced in the space surrounding the loops of
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Baldeo Persaud NT1310 Unit 7 Exercise 1: Fiber Optics- Definitions 1. Crosstalk – The coupling or transfer of unwanted signals from one pair within a cable to another pair. Crosstalk can be measured at the same (near) end or far end with respect to the signal source. Crosstalk is considered noise or interference and is expressed in decibels. 2. Waveguides – A structure that guides electromagnetic waves along their length. The core fiber in an optical-fiber cable is an optical waveguide. 3. FTTH
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w w e tr .X w ap eP m Location Entry Codes The content assessed by the examination papers and the type of questions are unchanged. This change means that for this component there are now two variant Question Papers‚ Mark Schemes and Principal Examiner’s Reports where previously there was only one. For any individual country‚ it is intended that only one variant is used. This document contains both variants which will give all Centres access to even more past examination material
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Light‚ Refraction and Lenses Name: Light Refraction Read from Lesson 1 of the Refraction and Lenses chapter at The Physics Classroom: http://www.physicsclassroom.com/Class/refrn/u14l1a.html http://www.physicsclassroom.com/Class/refrn/u14l1b.html http://www.physicsclassroom.com/Class/refrn/u14l1c.html http://www.physicsclassroom.com/Class/refrn/u14l1f.html MOP Connection: 1. 2. Refraction and Lenses: sublevels 1 and 2 Write a one-word synonym for refraction. Refraction occurs when light crosses
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Refractive index measurement is actually a measurement of the speed of light in a medium. The speed of light (usually denoted by c) is 299 792 458 m/s in vacuum. In other media the speed of light is lower than this value‚ and the refractive index‚ R.I.‚ of a medium is a measure of how much the speed of light is reduced in the medium. The refractive index (n) of a medium is defined as the ratio of speed of light in vacuum (c) in to that in the medium (v) The speed of light in a medium depends on
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Fiber Optics Assignment Many modern medical materials and equipment work on a principle which is beyond the capacity of human transducers. Comment and discuss the working principles of an endoscope‚ uteroscope or a rectoscope showing the illuminating path‚ the image path‚ transmission path and the liquid transfer or operating instrument ducts‚ showing the position of suitable valves. This will therefore explain how light travels through an optical fibre and show how such
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a. attenuation less b. bend c. refract d. deflect e. absorb 3. What does LASER stand for? a. Light Amplification by Stimulated Emission of Radiation b. Light Amplification of Spreading Emission Reflection c. Light Amplitude of Stimulated Emission of Refraction d. Light Amplitude of Stimulated Effect of Radiation 4. What causes most fiber optic attenuation and absorption? a. exceeding the bending radius b. impurities in the
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fibre‚ simply to carry the signals. The signals sent and received are coded voice messages and computer data. Optical fibres use light to carry information between too different sources. This system works on two key optical properties: Total internal reflection and refraction. Optical fibres are
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8th physics light reflection refraction eyes defect and dispersion The ray of light which falls on the mirror surface is called incident ray. The point at which the incident ray strikes the mirror is called the point of incidence. The ray of light which is sent back by the mirror is called the reflected ray. The ‘normal’ is a line drawn at right angles to the mirror surface at the point of incidence. The angle between incident ray and normal is called the angle of incidence. The angle between
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transmitted in two directions at the same time. 7. PHOTODIODE: 8. AMPLITUDE MODULATION: 9. ANALOG TRANSMISSION: 10. DIGITAL TRANSMISSION: 11. SAMPLE RATE: 12. ELECTROMAGNETIC WAVE: 13. REFRACTION: 14. MEDIUM: 15. TOTAL INTERNAL REFLECTION: 16. FRESNEL REFLECTION: 17. TENSILE REFLECTION: 18. DESPERSION: 19. BANDWIDTH: 20. POLARITY: 21. ABSORPTION: 22. SCATTERING: 23. EQUILIBRIUM MODE DISTRIBUTION: 24. PERSONAL PROTECTIVE EQUIPMENT: 25. GOOD WORK HABITS:
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