HISTORY OF FIBER OPTICS * In 1840‚ Daniel Colladon and Jacques Babinet demonstrated the principle of guiding light by refraction. * It was followed by a public demonstration by John Tyndal in 1852. In 1870‚ Tyndal wrote about the property of total internal reflection in his book about the nature of light. * In 1880‚ Alexander Graham Bell and Sumner Tainter invented the Photophone‚ a device capable of transmitting sound waves over beam of light. This is considered as mankind’s first attempt
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Your assignment is worth 50 points. Question 1 of 25 What property of a compound light microscope enables a person to change objectives without major focusing adjustments? resolving power magnification parfocal focusing resolution Question 2 of 25 How does closing the iris diaphragm affect image brightness and contrast? decreases both increases both decreases brightness and increases contrast increases brightness and decreases contrast decreases brightness but
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The pictures below show the optics of how this works. The grey circles are water droplets. White light enters the droplet and is refracted‚ then reflected off the back of the droplet‚ before leaving the drop split into its constituent colours‚ again refracted. Some light will travel
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Chapter 1 Introduction 1.1 History of Free Space Optics Even though fibre-optic communications gained worldwide acceptance in the telecommunication industry‚ FSO communications is still considered relatively new. But optical communication‚ in various forms‚ has been used for thousands of years. The Ancient Greeks polished their shields to send signals during battle. In the modern era‚ semaphores and wireless solar telegraphs called heliographs were developed‚ using coded signals to communicate
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Telescopes Hans Lippershey (1570 - September 1619) was a Dutch lens maker. Lippershey is believed to be the first to apply for a patent for his design‚ a few weeks before Jacob Metius (a Dutch instrument maker and optician)‚ and making it available for general use in 1608. The telescope invented by Lippershey was composed of a convex and a concave lens‚ as this construction did not invert the image and had only a magnification of just 3x. Galileo’s telescope improved the original Dutch telescopes
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Comparative Study of the Concentration Dependence of Different Softdrinks Using Refractive Index ____________________________ A Research Presented to the Faculty of Holy Trinity College‚ Puerto Princesa City ______________________________ In Partial Fulfillment of the Requirements For the Subject Physics I ______________________________ By: Abadilla‚ Abraham F. Canon‚ Gaea A. Cuadra‚ Cristy Marie O. Faigao‚ Anna Margarita O. Magay‚ Mary Stephanie T. Mestidio‚ Teresa P.
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Photometry Like all waves‚ light carries energy. The section of the optics‚ which are considered energetic characteristics of light in its broadcasting‚ distribution and interaction with a substance called Photometry. 1. Flow of light energy - energy transmitted through a surface per unit time. For example‚ the pupil of the eye glass window. If a body absorbs light fell on it‚ its internal energy increases‚ and thus its temperature increases. By changing temperatrata judge the flow of light
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scientists have recently found that they‚ along with other ordered non-periodic structures‚ exhibit unique optical effects as well‚ specifically negative refraction. To understand how ordered non-periodic structures are tested in the field of optics‚ one must first understand photonic crystals: crystals which exhibit effects of photon-directing similar to the electron-directing effects of semi-conductor crystals. The resulting phenomena occur by the fact that photonic crystals have dielectric
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still being littered with ribs of broken ships whose captains couldn’t see the shore line. In 1822 Augustin Fresnel‚ a French physicist and engineer invented a lens that would change light houses everywhere. Fresnel contributed to the theory of wave optics and studied the behavior of light both theoretically and experimentally. Fresnel worked on numerous formulas to calculate the way light changed directions‚ while passing through the prisms. He worked with some of the most advanced glass makers of
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An electron microscope is a type of microscope that produces an electronically-magnified image of a specimen for detailed observation. The electron microscope (EM) uses a particle beam of electrons to illuminate the specimen and create a magnified image of it. The microscope has a greater resolving power than a light-powered optical microscope‚ because it uses electrons that have wavelengths about 100‚000 times shorter than visible light (photons)‚ and can achieve magnifications of up to 1‚000‚000x
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