Physics307L F08:People/Trujillo/Balmer

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Contents

Balmer Series

Objective

To learn how to calibrate and use the spectrometer to determine the wavelengths of certain spectra to determine the Balmer series and Rydberg constant.


Calibration/Data

coloractual wavelengthmeasured wavelength
red690.75nm634nm
yellow579nm545nm
yellow577nm542nm
green546.1nm525nm
violet435.8nm422nm

Hydrogen

ColorMeasured ValueActual Wavelength (nm)Actual Wavelength (m)1/wavelengthn2 − 2n − 2Rydberg Constant
red 604 650.5060546 6.50506E-07 1537264.708 3 0.138888889 1.1068306E+07
blue green 466.5 484.927823 4.84928E-07 2062162.558 4 0.1875 1.0998200E+07
violet 421 430.1364809 4.30136E-07 2324843.496 5 0.21 1.1070683E+07
faint violet 400.2 405.0890102 4.05089E-07 2468593.259 6 0.222222222 1.1108670E+07

Rydberg Constant = 1.1061 * 10 − 7

STDV 4.6 * 10 − 10


Summary

And of course the excel file that I have in my notebook is corrupted. Apperantly our calibration data is off but for some reason the values we calculated for the Rydberg constants are within accepted values. I didnt expand the Balmer series as many students did.

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