Diffraction - Meredith Thomas Louis Roselli Martin Sims...

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Meredith Thomas, Louis Roselli, Martin Sims Physics 212 Lab - Diffraction November 17, 2010 Abstract: The purpose of this lab was to calculate and compare the spacing between the tracks of a CD and a DVD by using media as diffraction gratings. The materials used in this experiment were a helium-neon laser, one CD, one DVD, a three fingered clamp, a lab stand, tape, notebook paper, and a meter stick. Our objective was to find the width of the slit, d, for both media devices. We found d to be 878.54nm for the DVD and 1453.19nm for the CD.
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Introduction: The procedures to this experiment were pretty simple and did not take too much time. When shining the laser off of each CD we were to measure the bright spots that were diffracted out to the side from the original bright spot in the center of the wall. Each spot on the wall can be drawn into a triangle from where the CD or DVD is clamped to the center bright spot and then to the center of each of the brightest maxima. Procedure:
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This note was uploaded on 09/19/2011 for the course PHYS 112 taught by Professor Black during the Spring '11 term at South Carolina.

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Diffraction - Meredith Thomas Louis Roselli Martin Sims...

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