Physics307L:Labs/Balmer: Difference between revisions
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==Balmer Series== | ==Balmer Series== | ||
It is our aim to | It is our aim to successfully calibrate a constant deviation spectrometer with known values of the mercury spectrum and proceed to measure the spectra of hydrogen and deuterium. We will use these values to determine the Rydberg constant. Then we will use the same apparatus aimed at a sodium lamp in order to attempt to resolve the two characteristic closely spaced lines of its spectrum. | ||
==Procedure== | ==Procedure== |
Revision as of 22:16, 21 September 2008
Project name | <html><img src="/images/9/94/Report.png" border="0" /></html> Main project page |
Balmer SeriesIt is our aim to successfully calibrate a constant deviation spectrometer with known values of the mercury spectrum and proceed to measure the spectra of hydrogen and deuterium. We will use these values to determine the Rydberg constant. Then we will use the same apparatus aimed at a sodium lamp in order to attempt to resolve the two characteristic closely spaced lines of its spectrum. ProcedureThe procedure can be found in Dr. Gould's manual CalibrationBefore calibration begins we notice that the prism looks a little dusty and has white impurity on its backside. We are afraid that cleaning it might result in a change in its surface optical properties so we try to calibrate with the prism as is (If we can not isolate a spectral line adequately we will try to clean it).
MeasurementsBefore each set of measurements (for each element) we recalibrate the spectrometer to a different color so as to minimize the systematic error of our vernier scale accuracy. For all of these measurements we determine that, due to the physical limitations of the vernier scale, we can not be sure of their certainty to within +/-1nm.
-Accepted Values of Hydrogen Spectra
-Measured Values of Hydrogen Spectra 1st Run (calibrated to violet1)
2nd Run (calibrated to violet2)
3rd Run (calibrated to green/blue): For this run Darrell narrowed the slit to obtain higher resolution lines.
4th Run (calibrated to Red)
Now we'll get some data with the same calibration to compare our repeatability in reading 4th Run (Repeat of calibrated to Red)
4th Run (Repeat of calibrated to Red)
Keeping the final calibration used for hydrogen as it produced decent results compared to known spectra and decent repeatability 1st Run
2nd Run
3rd Run
4th Run
5th Run
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