intro to lab O4

# Intro to lab O4 - Introduction The wave nature of light was conclusively demonstrated by Thomas Young in the year 1801 when he was able to make

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Introduction : The wave nature of light was conclusively demonstrated by Thomas Young in the year 1801 when he was able to make white light diffract by passing a sunbeam through a pair of tiny slits. This phenomena, a consequence of the Superposition Principle which states the result of two wave forms superimposed on each other is the algebraic sum of the two is illustrated below: In this experiment, we will use a laser to pass through a double slit and single slit to produce a series of bright and dark spots where constructive and destructive interference take place. Double Slit Diffraction – Double slit diffraction occurs when a plane wave of light strikes a pair of slits separated by a distance “d.” The size of the double slits (openings) has to be on the order of or smaller than the separation between the two openings in order for us to observe double slit diffraction phenomena. Graphically:

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As the diffracted light waves spreads out, we will begin to see the two “wavelets” interfere with each other. When the difference in path length (we use the Greek symbol
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## This note was uploaded on 05/05/2008 for the course PHYS 222 taught by Professor Fedorchak during the Fall '08 term at Campbell.

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Intro to lab O4 - Introduction The wave nature of light was conclusively demonstrated by Thomas Young in the year 1801 when he was able to make

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