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Lab 10 - 513139 86741 7 5 27 8 3 tan 74006 6 5 27 25 3 tan...

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Randall Robert (9771) Jacob Porta (7090) Optical Electronics Lab EE 4270 Experiment 10 Measuring Laser Wavelength With a Ruler Tuesday; December 6, 2005 1
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Introduction: In this laboratory experiment we imagine the scenario of having to measure the wavelength of a laser with a ruler just to occupy our time. Figure 1: In order to measure the wavelength of the laser we must first assemble the components as shown in the figure below. Procedure: The procedure is to use the 1[mm] marks on the ruler as a diffraction grating. Then using the distance to the screen and distance between the first and zero order mode find the θ and use that along with the grating period to find the wavelength of the laser. The figure below labels all of the measurements taken during the laboratory procedure. 2
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] [ 6198 . 0 2 67 . 5 79 . 6 79 . 6 ) 614219 . 0 sin( 000063 . 0 67 . 5 ) 513139 . 0 sin( 000063 . 0 000063 . 0 ) sin( * 001 . 0 ) sin( 614219
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Unformatted text preview: . 513139 . 86741 . 7 5 . 27 8 . 3 tan 74006 . 6 5 . 27 25 . 3 tan 25 . 7 5 . 27 5 . 3 tan 7 7 7 7 1 1 1 m E E E E d d avg b a eff b a μ λ θ φ = + = = = = = = = = ° = ° = ° = = ° = = ° = =-------Conclusion: This lab, although very simple, required us to use prior knowledge that was gained in the previous laboratory experiments. There was a margin of error while conducting this experiment that caused us to get a different value for the wavelength other than the theoretical value of 0.6328[um]. This uncertainty comes from the inability to measure more accurately the displacement of the zero order to the first orders, which was equal to ±0.05[cm]. 4...
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