Being the second simplest of atoms, helium could certainly be a starting point for a quantitative spectral analysis beyond atomic hydrogen.Ībramzon and Siegel have described a spreadsheet that allows students to perform an introductory analysis of the helium spectrum ( American Journal of Physics 77 (10), October 2009, pp. In addition, students may also be asked to identify energy level transitions by consulting tables such as the online Atomic Spectra Database compiled by the National Institute of Standards and Technology (NIST).īut, would it be possible for students to perform a more quantitative analysis of atomic spectra beyond that of hydrogen? The addition of one more proton to the nucleus and one more orbiting electron, to make helium, results in a significantly more complex atomic system. Students also generally observe that some lines are brighter than others and may classify their intensity as strong, medium or weak. These are typically studied qualitatively with students noting many more spectral lines, but with each spectrum having its unique characteristic lines. Vernier has a variety of additional spectrum tubes available including helium, nitrogen, neon, carbon dioxide, air and argon. In this experiment, students use the Vernier Emissions Spectrometer to determine the wavelengths of the visible lines of excited hydrogen gas, relate photon energies to energy level transitions, and determine a value for the Rydberg constant for hydrogen. The “Spectrum of Atomic Hydrogen,” Experiment 21 in Advanced Physics with Vernier–Beyond Mechanics, is a classical investigation of the Balmer Series of the hydrogen spectrum. Operations Management and Information Systems.
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