File:FHlines.svg
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English: Emission spectra from a Franck–Hertz tube operated as at two voltages. The lefthand spectral lines are obtained at voltages high enough to obtain a glow discharge of the mercury atoms in the tube. The single spectral line on the right is obtained at a voltage just above 4.9 V, which is sufficient to excite the mercury atoms but insufficient to cause a glow discharge. The drawing is based on the original spectra published by Franck and Hertz in 1914.[1] The labels have been added; the original figure is unlabeled. The single, 254 nanometer wavelength of the Franck–Hertz tube corresponds well to the 4.9 V period of the electrical current through the tube. Franck himself described these features in a 1960 education film.[2] |
| Date | |
| Source | Own work |
| Author | Easchiff |
- ↑ Franck, J.; Hertz, G. (1914). "Über die Erregung der Quecksilberresonanzlinie 253,6 μμ durch Elektronenstöße". Verhandlungen der Deutschen Physikalischen Gesellschaft 16: 512–517. The symbol μμ is an outdated, rare usage for a nanometer. This article was reprinted in Franck, James; Hertz, Gustav and Hermann, Armin (1967) Die Elektronenstoßversuche, Munich: E. Battenberg OCLC: 9956175.
- ↑ See the Physical Science Study Committee film with an epilogue by Franck: Youtz, Byron L. (narrator); Franck, James (epilogue) and Churchill, Jack (director) (1960). Franck-Hertz experiment. Educational Services. Retrieved on 2014-07-01.; Franck's epilogue begins about 25 minutes into the film. A transcript of the epilogue was published shortly after the film was made; see Holton, Gerald (1961). "On the recent past of physics". American Journal of Physics 61: 808. DOI:10.1119/1.1937623.
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Attribution: E. A. Schiff
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| current | 02:18, 9 May 2014 | | 352 × 533 (8 KB) | Easchiff (talk | contribs) | User created page with UploadWizard |
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