zalles_Exp7 - Experiment 7 Spectroscopy Spring 2010 Name...

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Experiment 7 – Spectroscopy Spring 2010 Name Nicole Lab Section 414 Point Summary (See Blackboard for detailed grading rubric) Superior Excellent Satisfactory Fair Poor Omitted Introduction •Purpose of Report •Goals of Experiment Materials and Methods Results and Discussion •Description of data •Data Tables •Data Table Titles •Graphs •Figure Captions •Sample Calculations •Systematic Error •Random Error •Discussion of discrepancies Other Lab Technique TOTAL POINTS TA Comments/Suggestions:
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C HEMISTRY 101L R EPORT T EMPLATE EXPT. Spectroscopy 7 Introduction The purpose of this experiment was to construct an accurate spectroscope that included its own sort of calibration system that could be determining by creating an equation based on the analysis of a particular spectrum. From there, the spectroscope was used to observe and compare various other light emissions from different sources such as discharge tubes, light bulbs, and flames. The purpose of this report is to show the results of this experiment, as well as use emission line analysis of individual elements and applying our observations to identify an unknown. This experiment also applies the understanding of the relationships that exist between wavelength, frequency and energy of electromagnetic radiation in the spectra of light. From these relationships we are able to determine the photon wavelength, frequencies, energies, and, ultimately, the energy levels of these gaseous atoms within a point of spectra data. Materials and Methods The main source of reference for this experiment was the Chem 101L Laboratory Manual, Experiment 7, Spring 2010. Another source of reference was Hyperphysics; an internet site that aided in the supplying of the true values of the atomic line spectra of Balmer’s series of hydrogen. To start, a pizza box, ruler, graph paper, black electrical tape, diffraction grating, and box cutter needed to be obtained. Next, the box was laid out so it was completely flat, similar in position of Figure 6 in the lab manual. The next step was to use the box cutter and ruler to cut the appropriate openings in the box, again illustrated in Figure 6: First is the entrance slit, which was as vertically centered as possible on one side of the box; specifically, a distance of about 30mm from the left corner of the box. The hole itself was about 30mm high and 10 mm wide. The next hole to be cut was the sighting hole, which was cu on the opposite end of the entrance slit, as shown again in Figure 6 in the manual. This hole was cut to about 20mm square, also with the same distance as the entrance slit had from the left side of the box; approximately 30mm. It was also necessary to completely cut out the marked section on the other end of the box so when it was folded you could actually see out of the sighting hole. After the sighting hole and entrance slit were both cut, the illuminating slot was the next to be made. It is
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This note was uploaded on 02/24/2011 for the course CHEM 101L taught by Professor Austell during the Spring '08 term at UNC.

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zalles_Exp7 - Experiment 7 Spectroscopy Spring 2010 Name...

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