[Virginia Tech Department of Physics]

 Lecture Demonstrations
Modern Physics
   

Q15: Light Spectra of Gases

 

Purpose: To show the spectra of several gases excited by a discharge tube.

Description:

 

Place a discharge tube into the 5 kV (it can tickle!) power supply and turn on the voltage. Class members can view the spectra through the small gratings given to them. Suggest that they take the gratings home and view the light from street lamps and other light sources.

  Data on the spectra of the various discharge tubes is   available in the pdf file "spectra.pdf" .

 

 

Equipment List: Storage Location: CHEMP 130A

 

 Gas discharge tubes (including H, He, Ne, Hg, Kr, O, N, CO2, Cl, Air, H20, D) A1.2
  Power Supply A1.3
  Framed diffraction grating and cut small gratings for the class A1.2
  Incandescent light source A2.2

References:

Manual: None   Setup Notes: Q15 PIRA #:
Manufacturer(s): Other school's Demonstration web pages

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