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Code Number: 7B10.20
Demo Title: Spectral Lines/Spectroscopy - Mercury Emission Lines
Condition: Excellent
Principle: Spectra of Various Gases, Spectral Lines of Elements
Area of Study: Modern Physics, Optics, Astronomy
Equipment:
Mercury Projection Unit: Mercury Lamp with Power Supply on Small Optics Rail.
Procedure:
See also: 7B10.20 in Astronomy.
The mercury spectrum should be set up as shown. The mercury source will take at least 5 minutes warm-up.
The wavelengths of the main lines of mercury are:
Violet = 436 nm,
Green = 546 nm,
Yellow = 577 nm & 579 nm (this is actually 2 lines),
Red = 691 nm.
References:
- James Lincoln, "UV Light Revealed", TPT, Vol. 54, #4, Apr. 2016, p. 256.
- Nocholas R. Guilbert, "Shedding Some Light on Fluorescent Bulb", TPT, Vol. 34, #1, Jan. 1996, p. 20.
- "S-180: Concave Reflection Grating", DICK and RAE Physics Demo Notebook.
- Doug Balmer, "Identifying Mercury in Fluorescent Light Bulbs", The Caliper, Vernier Software & Technology, Fall 2017, p. 6.
- "20, Mercury Line Spectrum With a Diffraction Grating", Experiments in Optics, Part 1, J. Klinger Scientific Apparatus Corp., Bulletin 101.
- "17, Mercury Line Spectrum With a Prism", Experiments in Optics, Part 1, J. Klinger Scientific Apparatus Corp., Bulletin 101.
- D. Tattersfield, "7.23, The Spectrum of a Fluorescent Mercury Vapour Lamp", Project & Demonstrations in Astronomy, p.162.