PIRA 7B10.10 Emission Spectra
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Photo of the Demonstration at the University of Texas
at Austin.
Faculty Instructions:
The demo is best viewed with the room lights OFF.
- The demo comes with a tungsten filament and three separately powered spectral tube holders.
- Demonstration has emission spectra from both parts viewed through a diffraction grating.
Concept Conveyed:
Tungsten filament lamp viewed from dead center.
- Tungsten filament spectra is diffracted 7 evenly spaced colors, as shown above.
Rotate the front of the table slowly when showing one of the spectral tubes.
H2 in a darkened classroom.
- Spectral tubes through the diffraction grating show mostly higher wavelengths in the red, as shown above.
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