Demonstrations

Spectral Lines/Spectroscopy - Emission Lines

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Code Number :

7B10.10

Disclaimer:

Reprinted by permission of Dick Berg, University of Maryland, for use on this website.

The demonstrations contained and referenced herein are listed for the purposes of cataloging and describing physics demonstrations which should be conducted only under the direction of a trained instructional support professional or physicist. These demonstrations are not presented for the purpose of being conducted by persons unconnected to this Facility and/or persons not consulting with or being supervised by the recognized instructional support professional or physicist and his/her staff. The University is responsible only for those demonstrations carried out using its own equipment using established safety and scheduling policies, and bears no responsibility for those choosing to use this source material for their own purposes. All demonstrations described and contained herein are public domain, and can also be found in reference materials in libraries, bookstores, and electronic sources.

Further information regarding legal liability in use of demonstrations and labs will be found on the web site Injuries in School/College Laboratories in USA.

Condition :

Excellent

Principle :

Spectra of Various Gases, Spectral Lines of Elements

Area of Study :

Optics, Astronomy

Equipment :

Discharge tubes: Hydrogen; Helium; Mercury; Neon, Diffraction grating (large 4"X6"), Video Camera with Power Supply, Close-up lens for video camera, Discharge tube power supply.

Procedure :

Emission spectra can be shown by putting a discharge tube in front of the 4 X 6 inch grating and focusing the camera onto the grating . This may be set on either the optics bench or directly onto a table as shown.

References

Bruce C. Palmquist, "Interactive Spectra Demonstration," TPT, Vol. 40, # 3, p. 140, (March 2002).

Donald F. Collins, "Video Spectroscopy - Emission, Absorption, and Flash," TPT, Vol. 38, # 9, p. 561, (Dec. 2000).

Samuel M. Sampere, "The Neon Sign", TPT, Vol. 37, # 3, Mar. 1999, p. 140.

Michael C. Lo Presto, "A Closer Look at the Spectrum of Helium," TPT, Vol. 36, # 3, p. 172, (March 1998).

David Thompson, "Three Everyday Examples of Quantization", TPT, Vol. 36, # 2, Feb. 1998, p. 92.

Gary Kessler, "Recycle Outmoded Air - Track Components," TPT, Vol. 33, # 7, p. 473, Oct. 1995.

R. B. Knollenberg, III, "A Real Spectrum Chart", TPT, Vol. 31, # 3, Mar. 1993, p. 187.

Vittorio Zanetti and John Harris, "Spectra of Three Light Sources with a CD," TPT, Vol. 31, # 2, p. 82, (February 1993).

John W. Jewett, "Get The LED Out", TPT, Vol. 29, # 8, Nov. 1991, p. 530.

Zofia Goalb-Meyer, "Piekara's Chair": Mechanical Model for Atomic Energy Levels", TPT, Vol. 29, # 4, Apr. 1991, p. 215.

Frank A. Smith, Jr., "Lecture-Demonstration Comparison of Two Spectra", TPT, Vol. 24, # 5, May 1986, p. 284.

Robert Gardner, Stanley Ballard, "Why are Some Lines in the Hydrogen Spectrum Brighter than Others?", TPT, Vol. 16, # 4, Apr. 1978, p. 244.

Lee R. Anderson, "Spectra Comparisons", TPT, Vol. 11, # 7, p. 435, (Oct. 1973).

Herbert H. Gottlieb, "Determining Light Wavelengths Individually by Use of One Spectral Source for the Class", TPT, Vol. 4, # 8, Nov. 1966, p. 376.

William F. Meggers, "Spectra Inform Us About Atoms", TPT, Vol. 2, # 7, Oct. 1964, p. 303.

M. Vollmer, "Hot Gases: The Transition from Line Spectrum to Thermal Radiation", AJP, Vol. 73, March 2005, p. 215.

Robert de Levie, "On Deconvolving Spectra," AJP, Vol. 72, # 7, p. 910, July 2004.

Anne L. Boreen, Renae L. Coons, Darin J. Ulness, "Investigating Collisional Broadening of Spectral Lines Using a Tuning Fork: An Undergraduate Laboratory", AJP, Vol. 68, # 8, p. 768, August 2000.

G. B. Bianchetti and S. Ganci, "A Demonstration Experiment to Display Diffraction Patterns on an Oscilloscope," AJP, p. 283, Vol. 54, # 3, (March 1986).

O-510: "Aperture - Line or Other Image," DICK and RAE Physics Demo Notebook.

O-520: "Concave Mirror," DICK and RAE Physics Demo Notebook.

A-11: Richard Manliffe Sutton, Demonstration Experiments in Physics.

Jearl Walker, "The Spectra of Streetlights Illuminate Basic Principles of Quantum Mechanics," The Amateur Scientist, (January, 1984).

Isaac Asimov, "What Are Little Stars Made Of," Fantasy and Science Fiction Magazine, pp. 125.

Robert Ehrlich, "Diffraction-Grating Sheets," Turning the World Inside Out, pp. 203-204.

Ron Hipschman, "Spectra," Exploratorium Cookbook II, pp. 131.1 - 131.3.

"Spectroscopy," The New Illustrated - Science & Invention Encyclopedia, pp. 2528-2532.

C. Harvey Palmer, "Experiment D2: The Grating Spectrometer," Optics - Experiments and Demonstrations, John Hopkins Press, 1962

"A Study of Spectra", Selective Experiments in Physics, CENCO, 1962.

Mail Questions and Comments to: Dale Stille