![]() Elliott is co-author of several books, including Introduction to Fiber Optics, 3rd Edition (Elsevier), and Fiber Optic Cabling, 2nd Edition (Newnes). He is a past Chairman of the cabling trade organization BICSI and the first CIBSE Low Carbon Consultant to apply this qualification to the computer room environment. ![]() Elliott specializes in IT infrastructure and developed the world's first data center qualification. He has worked for BICC, Ferranti, Civil Aviation Authority, Brand-Rex, Novar plc, and Honeywell, and is one of Capitoline Consultancy Group's founders. Copyright © 2021 AIP Publishing LLC About theīarry Elliott has over 20 years of experience in the IT industry. Print Version Barry Elliott, Optical Communication (AIP Publishing, Melville, New York, 2021). On screen text reads: refraction, diffraction, and waves. A wavy line is shown traveling across the bottom of the screen. Reflection of light occurs when light rays. An animation shows a group of bent horizontal line segments traveling across the top of the screen. Hint: In this question we will know what are the differences between reflection, refraction, and diffraction. Online Version Barry Elliott, Optical Communication, available at: Refraction and diffraction are both important properties of waves. The mathematics of Snell, Huygens and Fermat can explain and predict the laws of refraction, but a more complete understanding of why it happens can be taken from Maxwell)s equations and these will be introduced in this chapter. Electromagnetic waves, including light and radio waves, can be refracted through the atmosphere and refraction is at the heart of how optical fibres work. Reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it. But when light travels through a medium which is not totally opaque and has some density above a vacuum there is an interaction between the light and the physical medium which has the effect of slowing the light down. We have to come to learn that the speed of light is a constant, just under 300,000 km per second. This happens because light slows down when it travels through a transparent medium. Arguably the most complex and important element of this set of phenomena is refraction, the apparent bending of the path of a ray of light when it passes from one medium to another. A wave entering a medium at an angle will. ![]() In this chapter we shall address the principles of reflection, refraction and diffraction. Reflection, Refraction, and Diffraction Refraction occurs when a wave crosses a boundary from one medium to another. To understand how light propagates through a medium we need to know the basics of electromagnetic theory, polarization, reflection, diffraction and diffraction.
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