Rubenstein_Exp7 - Experiment 7 Spectroscopy Spring 2009...

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Experiment 7 – Spectroscopy Spring 2009 Name Alec Rubenstein Lab Day and Time Monday 1:00 PM TA Tom Martz Section 403 Documentation Lab Manual: Experiment 7 Possible Points Points Received Introduction 10 Purpose of report Goals of the experiment Materials and Methods 20 Reference lab manual Described procedure for building spectroscope Described deviations from the procedure Results and Discussion 50 Inserted titles for tables Inserted graphs into template Inserted captions for each graph Showed complete sample calculations Summarized all data in tables Answered questions completely Error analysis Laboratory Technique 20 TOTAL (100) TA Comments/Suggestions:
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C HEMISTRY 101L R EPORT T EMPLATE EXPT. Spectroscopy 7 Introduction The purpose of this report is to describe the experiments and procedures followed to explore spectroscopy and the nature of electromagnetic radiation. A simple spectroscope was constructed with a built-in quantitative calibration system to compare various continuous emission sources and to obtain the atomic line spectra of light emitted from various sources. From the data collected, the photon wavelengths, frequencies, and energies from the line spectra data were calculated in order to explore the relationship between the speed of electromagnetic radiation, wavelength, frequency, and transition. Materials and Methods The procedure for this experiment was taken from the UNC Lab Manual: Experiment 7. A basic spectrometer was constructed using a pizza box, diffraction grating, corrugate cardboard as a cutting board, black electrical tape, and a razor knife. First, the pizza box was placed flat on the desk. The razor knife was used to cute an entrance slit centered vertically 30 mm from the left corner of one side of the box. The entrance slit was cut 30 mm high by 10 mm wide. The sighting hole was then cute at the end of the box opposite the entrance slit in a 20 mm high by 20 mm wide square centered vertically 30 mm from the left corner of the box. The illuminating slot was then cut in the end of the spectroscope beside the entrance slit, approximately 35 mm from the right edge of the entrance slit, with dimensions of 6 mm high by 120 mm wide. The graph paper was then numbered every fifth line for later reference. Once the graph paper was numbered, it was placed over the illuminating slot on the outside of the box and taped into place. The numbers were directly over the illuminating slot. The spectrometer was then put together by tightly using black electrical tape to seal the pizza box. The entrance slit was then covered with two pieces of electrical tape to define an approximately 1 mm entrance slit. The diffraction grating was then mounted over the sighting hole. Once the orientation was found by aiming the spectroscope toward the room lights and observing the proper colored images of the slit on the graph paper, tape was placed over the sighting hole. The finished spectrometer was then used to conduct the experiment. Results and Discussion
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This document was uploaded on 11/04/2011 for the course CHEM 101 at UNC.

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Rubenstein_Exp7 - Experiment 7 Spectroscopy Spring 2009...

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