Date: Tue, 12 Mar 2002 12:13:27 -0500 (EST)

Author: Richard Berg

Subject: Re: spectra

Post:

Using a high-pressure sodium lamp you can show several kinds of spectra
and model the discovery of helium (on the sun). Try:

http://www.physics.umd.edu/deptinfo/facilities/lecdem/n2-03.htm

Point out that it is not true that astronauts discovered helium on the sun
when they went there and discovered that their voices got higher.

Dick Berg

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Dr. Richard E. Berg, Director Phone: (301) 405-5994
Lecture-Demonstration Facility FAX: (301) 314-9525
Department of Physics e-mail reberg@physics.umd.edu
University of Maryland www.physics.umd.edu/lecdem
College Park, MD 20742-4111
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If you think education is expensive, try ignorance.
Derek Bok,
Former President, Harvard University
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